{"product_id":"opi-natural-nail-strengthener","title":"OPI Natural Nail Strengthener — Strengthening Base Coat (15 mL, NTT60)","description":"\u003cstyle\u003e\n\/* Wonjo canonical stylesheet v3.0 — see wonjo-style-LOCKED.md for documentation *\/\n\n  \/* === WRAPPERS === *\/\n  .wonjo-wrap { font-family: 'Apple SD Gothic Neo', 'Noto Sans KR', 'Malgun Gothic', sans-serif; color: #2b2b2b; font-size: 16px; line-height: 1.85; max-width: 720px; }\n  .wonjo-wrap-kr { font-family: 'Apple SD Gothic Neo', 'Noto Sans KR', 'Malgun Gothic', sans-serif; color: #2b2b2b; font-size: 16px; line-height: 1.95; max-width: 720px; }\n\n  \/* === COMMON TEXT === *\/\n  .wonjo-wrap p, .wonjo-wrap-kr p { margin: 0 0 13px 0; color: #3a3a3a; }\n  .wonjo-wrap ul, .wonjo-wrap-kr ul { margin: 0 0 13px 0; padding-left: 18px; color: #3a3a3a; }\n  .wonjo-wrap ul li, .wonjo-wrap-kr ul li { margin-bottom: 7px; }\n\n  \/* === HEADINGS — H2 (old protein template) === *\/\n  .wonjo-wrap h2 { font-size: 16px; font-weight: 700; text-transform: uppercase; letter-spacing: 1.2px; color: #4a7c59; margin: 36px 0 8px 0; }\n  .wonjo-wrap-kr h2 { font-size: 18px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.8px; color: #4a7c59; margin: 36px 0 8px 0; }\n\n  \/* === HR SEPARATOR (under h2 + inside details) === *\/\n  .wonjo-wrap hr, .wonjo-wrap-kr hr,\n  .wonjo-wrap details hr, .wonjo-wrap-kr details hr { border: none; border-top: 1.5px solid #4a7c59; margin: 0 0 18px 0; }\n\n  \/* === DETAILS \/ SUMMARY (rounds 1-4 + LEGO) === *\/\n  .wonjo-wrap details, .wonjo-wrap-kr details { margin: 0; border-bottom: 1px solid #e8e8e4; }\n  .wonjo-wrap details:last-of-type, .wonjo-wrap-kr details:last-of-type { border-bottom: none; }\n\n  .wonjo-wrap details summary { font-size: 16px; font-weight: 700; text-transform: uppercase; letter-spacing: 1.2px; color: #4a7c59; padding: 20px 30px 20px 0; cursor: pointer; list-style: none; position: relative; }\n  .wonjo-wrap-kr details summary { font-size: 18px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.8px; color: #4a7c59; padding: 20px 30px 20px 0; cursor: pointer; list-style: none; position: relative; }\n\n  .wonjo-wrap details summary::-webkit-details-marker, .wonjo-wrap-kr details summary::-webkit-details-marker { display: none; }\n  .wonjo-wrap details summary::after, .wonjo-wrap-kr details summary::after { content: '+'; position: absolute; right: 0; top: 50%; transform: translateY(-50%); font-size: 20px; font-weight: normal; color: #4a7c59; }\n  .wonjo-wrap details[open] summary::after, .wonjo-wrap-kr details[open] summary::after { content: '−'; }\n\n  \/* Content spacing — handles both direct-children variant AND \u003cdiv\u003e wrapper variant *\/\n  .wonjo-wrap details \u003e *:not(summary):not(hr), .wonjo-wrap-kr details \u003e *:not(summary):not(hr) { margin-bottom: 13px; }\n  .wonjo-wrap details \u003e *:last-child, .wonjo-wrap-kr details \u003e *:last-child { margin-bottom: 18px; }\n  .wonjo-wrap details \u003e div, .wonjo-wrap-kr details \u003e div { padding: 0 0 20px 0; }\n\n  \/* === SPEC GRID === *\/\n  .wonjo-wrap .spec-grid, .wonjo-wrap-kr .spec-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0; margin: 0 0 16px 0; border: 1px solid #e8e8e4; border-radius: 4px; overflow: hidden; }\n  .wonjo-wrap .spec-item, .wonjo-wrap-kr .spec-item { padding: 10px 14px; border-bottom: 1px solid #e8e8e4; font-size: 14px; }\n  .wonjo-wrap .spec-item:nth-last-child(-n+2), .wonjo-wrap-kr .spec-item:nth-last-child(-n+2) { border-bottom: none; }\n  .wonjo-wrap .spec-label, .wonjo-wrap-kr .spec-label { font-size: 13px; text-transform: uppercase; letter-spacing: 0.8px; color: #4a7c59; display: block; margin-bottom: 2px; font-weight: bold; }\n  .wonjo-wrap .spec-value, .wonjo-wrap-kr .spec-value { color: #2b2b2b; }\n\n  \/* === TIPS \/ WARNINGS === *\/\n  .wonjo-wrap .tip, .wonjo-wrap-kr .tip { background: #f4f8f5; border-left: 3px solid #4a7c59; padding: 12px 16px; font-size: 13.5px; color: #4a5a4a; margin: 14px 0; font-style: italic; }\n  .wonjo-wrap .tip-warn, .wonjo-wrap-kr .tip-warn { background: #fdf6e3; border-left: 3px solid #b8860b; padding: 12px 16px; font-size: 13.5px; color: #6e5828; margin: 14px 0; font-style: italic; }\n\n  \/* === BADGES === *\/\n  .wonjo-wrap .badge-row, .wonjo-wrap-kr .badge-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 16px 0; }\n  .wonjo-wrap .badge, .wonjo-wrap-kr .badge { font-size: 11.5px; border: 1px solid #c2d8c9; background: #eef5f0; color: #3a6b48; border-radius: 3px; padding: 5px 11px; font-weight: bold; letter-spacing: 0.3px; }\n  .wonjo-wrap .badge-eco, .wonjo-wrap-kr .badge-eco { border-color: #b5cfa9; background: #e8f3e0; color: #2d5c1f; }\n  .wonjo-wrap .badge-safe, .wonjo-wrap-kr .badge-safe { border-color: #d4a574; background: #fdf3e3; color: #8a5a1a; }\n\n  \/* === SKILL TAG ROW (rounds 1-4 kids\/toys) === *\/\n  .wonjo-wrap .skill-row, .wonjo-wrap-kr .skill-row { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 18px 0; padding-bottom: 16px; border-bottom: 1px solid #e8e8e4; }\n  .wonjo-wrap .skill-tag, .wonjo-wrap-kr .skill-tag { font-size: 11px; background: #fdfcf8; border: 1px solid #e4e0d6; color: #6a5a3a; border-radius: 14px; padding: 4px 10px; letter-spacing: 0.2px; }\n\n  \/* === REVIEW CARDS (protein listings) === *\/\n  .wonjo-wrap .review-card, .wonjo-wrap-kr .review-card { background: #fdfcf8; border: 1px solid #e4e0d6; border-radius: 6px; padding: 18px 20px; margin-bottom: 14px; }\n  .wonjo-wrap .review-text, .wonjo-wrap-kr .review-text { color: #3a3a3a; margin: 0 0 10px 0; font-style: italic; }\n  .wonjo-wrap .review-name, .wonjo-wrap-kr .review-name { font-size: 12.5px; color: #888; font-style: normal; }\n\n  \/* === SET CARDS (LEGO bundle template) === *\/\n  .wonjo-wrap .set-card, .wonjo-wrap-kr .set-card { background: #fdfcf8; border: 1px solid #e4e0d6; border-radius: 6px; padding: 18px 22px; margin-bottom: 16px; }\n  .wonjo-wrap .set-card .set-no, .wonjo-wrap-kr .set-card .set-no { font-size: 13px; letter-spacing: 1px; color: #4a7c59; text-transform: uppercase; margin: 0 0 4px 0; font-weight: bold; }\n  .wonjo-wrap .set-card h3, .wonjo-wrap-kr .set-card h3 { font-size: 17px; margin: 0 0 10px 0; color: #2b2b2b; font-weight: 700; }\n  .wonjo-wrap .set-card p, .wonjo-wrap-kr .set-card p { margin: 0 0 8px 0; }\n  .wonjo-wrap .set-card .set-stats, .wonjo-wrap-kr .set-card .set-stats { font-size: 13.5px; color: #666; margin-top: 8px; }\n\n  \/* === PLAY STAGES (rounds 1-4 age-progression) === *\/\n  .wonjo-wrap .play-stage, .wonjo-wrap-kr .play-stage { padding: 10px 0; border-bottom: 1px dashed #e8e8e4; }\n  .wonjo-wrap .play-stage:last-child, .wonjo-wrap-kr .play-stage:last-child { border-bottom: none; }\n  .wonjo-wrap .play-stage-age, .wonjo-wrap-kr .play-stage-age { font-size: 13px; text-transform: uppercase; letter-spacing: 0.8px; color: #4a7c59; font-weight: bold; display: block; margin-bottom: 4px; }\n  .wonjo-wrap .play-stage-text, .wonjo-wrap-kr .play-stage-text { color: #3a3a3a; font-size: 14.5px; }\n\n  \/* === FAQ === *\/\n  .wonjo-wrap .faq-q, .wonjo-wrap-kr .faq-q { font-size: 13.5px; color: #4a7c59; font-weight: bold; margin: 14px 0 6px 0; }\n  .wonjo-wrap .faq-a, .wonjo-wrap-kr .faq-a { color: #3a3a3a; margin: 0 0 13px 0; padding-left: 14px; border-left: 2px solid #e8e8e4; }\n\n  \/* === STEPS (numbered ordering process) === *\/\n  .wonjo-wrap .steps, .wonjo-wrap-kr .steps { list-style: none; padding: 0; margin: 0 0 13px 0; }\n  .wonjo-wrap .steps { counter-reset: wonjo-steps; }\n  .wonjo-wrap-kr .steps { counter-reset: wonjo-steps-kr; }\n  .wonjo-wrap .steps li { counter-increment: wonjo-steps; padding: 10px 0 10px 38px; border-bottom: 1px solid #e8e8e4; position: relative; color: #3a3a3a; }\n  .wonjo-wrap-kr .steps li { counter-increment: wonjo-steps-kr; padding: 10px 0 10px 38px; border-bottom: 1px solid #e8e8e4; position: relative; color: #3a3a3a; }\n  .wonjo-wrap .steps li:last-child, .wonjo-wrap-kr .steps li:last-child { border-bottom: none; }\n  .wonjo-wrap .steps li::before { content: counter(wonjo-steps); position: absolute; left: 0; top: 11px; font-size: 11px; font-weight: bold; color: #4a7c59; width: 22px; height: 22px; border: 1.5px solid #4a7c59; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; }\n  .wonjo-wrap-kr .steps li::before { content: counter(wonjo-steps-kr); position: absolute; left: 0; top: 11px; font-size: 11px; font-weight: bold; color: #4a7c59; width: 22px; height: 22px; border: 1.5px solid #4a7c59; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; }\n\n  \/* === INTRO SUBTITLE === *\/\n  .wonjo-wrap .intro-subtitle, .wonjo-wrap-kr .intro-subtitle { font-size: 17px; line-height: 1.6; color: #4a7c59; font-style: italic; margin: 0 0 18px 0; padding-bottom: 18px; border-bottom: 1px solid #e8e8e4; }\n\n  \/* === SECTION SUBTITLE === *\/\n  .wonjo-wrap .section-subtitle, .wonjo-wrap-kr .section-subtitle { font-size: 13px; color: #777; font-style: italic; margin: -2px 0 16px 0; }\n\n  \/* === KEYWORDS (related searches at bottom) === *\/\n  .wonjo-wrap .keywords, .wonjo-wrap-kr .keywords { font-size: 13px; color: #777; line-height: 1.7; letter-spacing: 0.2px; }\n\n  \/* === MOBILE MEDIA QUERY === *\/\n  @media (max-width: 600px) {\n    .wonjo-wrap details summary, .wonjo-wrap-kr details summary { padding: 18px 30px 18px 0 !important; }\n    .wonjo-wrap details summary, .wonjo-wrap h2 { font-size: 15px !important; letter-spacing: 1px !important; }\n    .wonjo-wrap-kr details summary, .wonjo-wrap-kr h2 { font-size: 18px !important; letter-spacing: 0.8px !important; }\n    .wonjo-wrap, .wonjo-wrap-kr { font-size: 16px !important; }\n    .wonjo-wrap .intro-subtitle, .wonjo-wrap-kr .intro-subtitle { font-size: 17px !important; }\n  }\n\u003c\/style\u003e\n\n\u003cdiv class=\"wonjo-wrap\"\u003e\n\n  \u003cp class=\"intro-subtitle\"\u003eOPI's strengthening base coat for natural nails — calcium and wheat protein in a single-coat application that gives weak nails extra structure before color. Different from the Nail Envy 7-day cycle: this is a daily base coat that wears under your favorite OPI Nail Lacquer.\u003c\/p\u003e\n\n  \u003cdetails open\u003e\n    \u003csummary\u003eAbout This Product\u003c\/summary\u003e\n    \u003chr\u003e\n    \u003cdiv class=\"badge-row\"\u003e\n\u003cspan class=\"badge\"\u003eDirect from US\u003c\/span\u003e\u003cspan class=\"badge\"\u003ePersonal Import\u003c\/span\u003e\u003cspan class=\"badge\"\u003e15 mL\u003c\/span\u003e\u003cspan class=\"badge\"\u003eBase Coat + Strengthener\u003c\/span\u003e\u003cspan class=\"badge\"\u003eMade in USA\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"skill-row\"\u003e\n\u003cspan class=\"skill-tag\"\u003eWeak nails\u003c\/span\u003e\u003cspan class=\"skill-tag\"\u003eThin nails\u003c\/span\u003e\u003cspan class=\"skill-tag\"\u003eBreakage\u003c\/span\u003e\u003cspan class=\"skill-tag\"\u003ePolish bonding\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cp\u003eNatural Nail Strengthener is OPI's foundational strengthening base coat — designed as a single-application alternative to the Natural Nail Base Coat for shoppers whose nails need a bit more support before color. The formula combines calcium with hydrolyzed wheat protein to add layer-strength to weak or thin nails, creating a stronger surface for nail lacquer to bond to.\u003c\/p\u003e\n\u003cp\u003eWhere Nail Envy is a 7-day building cycle worn alone or as base, Natural Nail Strengthener is closer to a regular base coat — one coat, then your color, then top coat, all in the same manicure session. Korean shoppers comparing the two: choose Nail Envy if you want a treatment phase between manicures; choose Natural Nail Strengthener if you want strengthening built into your normal painting routine.\u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails\u003e\n    \u003csummary\u003eProduct Details\u003c\/summary\u003e\n    \u003chr\u003e\n    \u003cdiv class=\"spec-grid\"\u003e\n\u003cdiv class=\"spec-item\"\u003e\n\u003cspan class=\"spec-label\"\u003eBrand\u003c\/span\u003e\u003cspan class=\"spec-value\"\u003eOPI (Wella Company)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-item\"\u003e\n\u003cspan class=\"spec-label\"\u003eSub-line\u003c\/span\u003e\u003cspan class=\"spec-value\"\u003eNatural Nail Strengthener\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-item\"\u003e\n\u003cspan class=\"spec-label\"\u003eFormat\u003c\/span\u003e\u003cspan class=\"spec-value\"\u003eStrengthening base coat\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-item\"\u003e\n\u003cspan class=\"spec-label\"\u003eNet Volume\u003c\/span\u003e\u003cspan class=\"spec-value\"\u003e15 mL \/ 0.5 fl oz\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-item\"\u003e\n\u003cspan class=\"spec-label\"\u003eDrying Time\u003c\/span\u003e\u003cspan class=\"spec-value\"\u003e60-90 seconds per coat\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-item\"\u003e\n\u003cspan class=\"spec-label\"\u003eWear Cycle\u003c\/span\u003e\u003cspan class=\"spec-value\"\u003eSingle coat per manicure (not a multi-day cycle)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-item\"\u003e\n\u003cspan class=\"spec-label\"\u003eLasts Approx.\u003c\/span\u003e\u003cspan class=\"spec-value\"\u003e~12 weeks per bottle at typical use\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-item\"\u003e\n\u003cspan class=\"spec-label\"\u003eCountry of Origin\u003c\/span\u003e\u003cspan class=\"spec-value\"\u003eUSA\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails\u003e\n    \u003csummary\u003eKey Ingredients \u0026amp; Free-Of Profile\u003c\/summary\u003e\n    \u003chr\u003e\n    \u003cp\u003eNatural Nail Strengthener uses a classic two-ingredient strengthening complex — straightforward and time-tested.\u003c\/p\u003e\n    \u003cdiv class=\"spec-grid\"\u003e\n\u003cdiv class=\"spec-item\"\u003e\n\u003cspan class=\"spec-label\"\u003ePrimary Active\u003c\/span\u003e\u003cspan class=\"spec-value\"\u003eCalcium — for nail layer strength\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-item\"\u003e\n\u003cspan class=\"spec-label\"\u003eProtein Component\u003c\/span\u003e\u003cspan class=\"spec-value\"\u003eHydrolyzed wheat protein — bonds to keratin\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-item\"\u003e\n\u003cspan class=\"spec-label\"\u003eFormat\u003c\/span\u003e\u003cspan class=\"spec-value\"\u003eClear strengthening base coat\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-item\"\u003e\n\u003cspan class=\"spec-label\"\u003eColor Tint\u003c\/span\u003e\u003cspan class=\"spec-value\"\u003eNone — applies clear\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n    \n  \u003c\/details\u003e\n\n  \u003cdetails\u003e\n    \u003csummary\u003eHow to Use\u003c\/summary\u003e\n    \u003chr\u003e\n    \u003col class=\"steps\"\u003e\n\u003cli\u003eStart with clean, dry, polish-free nails. Push back cuticles gently with an orange wood stick.\u003c\/li\u003e\n\u003cli\u003eApply 1 thin coat of Natural Nail Strengthener to bare nails.\u003c\/li\u003e\n\u003cli\u003eAllow 60-90 seconds to dry completely.\u003c\/li\u003e\n\u003cli\u003eApply 2 thin coats of your favorite OPI Nail Lacquer color, allowing each to dry.\u003c\/li\u003e\n\u003cli\u003eFinish with 1 coat of OPI Top Coat (or Matte Top Coat \/ Mirror Shine \/ RapiDry for different finishes).\u003c\/li\u003e\n\u003cli\u003eRepeat with each new manicure — no daily refresh needed.\u003c\/li\u003e\n\u003c\/ol\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails\u003e\n    \u003csummary\u003eTips From Pro Nail Artists\u003c\/summary\u003e\n    \u003chr\u003e\n    \u003cdiv class=\"tip\"\u003eNatural Nail Strengthener is the base-coat option for shoppers who want strengthening built into a normal manicure. Apply thin — heavy coats slow drying and chip more easily.\u003c\/div\u003e\n\u003cdiv class=\"tip\"\u003eFor maximum strengthening over time, alternate between Natural Nail Strengthener (used during color phases) and Nail Envy Original (used during between-manicure treatment phases). The two products serve different roles in a complete nail-care routine.\u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails\u003e\n    \u003csummary\u003ePairs Well With\u003c\/summary\u003e\n    \u003chr\u003e\n    \u003cdiv class=\"play-stage\"\u003e\n\u003cspan class=\"play-stage-age\"\u003eApply directly to\u003c\/span\u003e\u003cspan class=\"play-stage-text\"\u003eBare, polish-free nails. Push back cuticles first.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"play-stage\"\u003e\n\u003cspan class=\"play-stage-age\"\u003eLayer with\u003c\/span\u003e\u003cspan class=\"play-stage-text\"\u003eAny OPI Nail Lacquer color — Natural Nail Strengthener serves as the strengthening base.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"play-stage\"\u003e\n\u003cspan class=\"play-stage-age\"\u003eSeal with\u003c\/span\u003e\u003cspan class=\"play-stage-text\"\u003eOPI Top Coat for classic gloss, Matte Top Coat for matte, Mirror Shine for high-shine, or RapiDry for fast drying.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"play-stage\"\u003e\n\u003cspan class=\"play-stage-age\"\u003eRemove with\u003c\/span\u003e\u003cspan class=\"play-stage-text\"\u003eOPI Expert Touch Lacquer Remover (110 mL or 480 mL) — acetone-based for clean removal.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"play-stage\"\u003e\n\u003cspan class=\"play-stage-age\"\u003ePair daily with\u003c\/span\u003e\u003cspan class=\"play-stage-text\"\u003eOPI ProSpa Nail \u0026amp; Cuticle Oil (14.8 mL dropper at home, 7.3 mL To Go pen for purse\/work bag).\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails\u003e\n    \u003csummary\u003eWhy Korean Customers Reach For This\u003c\/summary\u003e\n    \u003chr\u003e\n    \u003cp\u003eKorean shoppers comparing strengthening options often face a choice between \"base coat with benefits\" (Natural Nail Strengthener) and \"treatment cycle\" (Nail Envy Original). The right answer depends on your manicure rhythm — frequent polish changes favor Natural Nail Strengthener; longer between-color stretches favor Nail Envy.\u003c\/p\u003e\n\u003cp\u003eOPI's broader strengthening lineup is more available in the US than in Korean retail. The Natural Nail Strengthener specifically isn't always carried by Korean OPI distributors, leaving direct import as the main route for Korean shoppers who specifically want this product over the more-stocked Nail Envy line.\u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails\u003e\n    \u003csummary\u003eShipping\u003c\/summary\u003e\n    \u003chr\u003e\n    \u003cp\u003eFree shipping on every order, with no minimum. No handling fees, no customs processing charges, nothing added at checkout.\u003c\/p\u003e\n    \u003cp\u003eOrders are dispatched within 1 to 2 business days. A tracking number is sent to your email once your parcel is on its way. International transit to Korea typically takes 7 to 14 days depending on customs clearance.\u003c\/p\u003e\n    \u003cdiv class=\"tip\"\u003eAll orders ship in plain unmarked boxes for discretion.\u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails\u003e\n    \u003csummary\u003eCustoms \u0026amp; Import\u003c\/summary\u003e\n    \u003chr\u003e\n    \u003cp\u003eAll orders are processed as personal-use overseas purchases and clear Korean customs without requiring KC certification. Your shipment is handled using your Personal Customs Clearance Code (PCCC) and is trackable via Korea Customs Service UNI-PASS. Personal-use imports from the United States with a declared value under USD 200 generally qualify for duty-free clearance; if any duty applies, it is payable by the customer at the time of receipt.\u003c\/p\u003e\n    \u003cdiv class=\"tip\"\u003eIf you do not yet have a PCCC, you can get one free in under five minutes at unipass.customs.go.kr.\u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails\u003e\n    \u003csummary\u003eAbout Us\u003c\/summary\u003e\n    \u003chr\u003e\n    \u003cp\u003eWe work directly with US professional nail-supply distribution — the same channels US salons buy from. Every bottle is factory-sealed direct from OPI's US production, never re-bottled or repackaged, never grey-market sourced.\u003c\/p\u003e\n\u003cp\u003eOPI is a US professional nail-care brand founded in 1981 and now owned by Wella Company. OPI is the most-recognized professional nail brand worldwide, sold through salon-supply distribution and select beauty retail. The treatment line — Nail Envy, Repair Mode, Natural Nail Strengthener, and Start to Finish — has been a category-defining range for over three decades.\u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails\u003e\n    \u003csummary\u003eFAQ\u003c\/summary\u003e\n    \u003chr\u003e\n    \u003cdiv class=\"faq-q\"\u003eQ: Is this the same as OPI Natural Nail Base Coat?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eSimilar position in the manicure layering process, but Natural Nail Strengthener has added calcium and protein for additional strengthening. Base Coat focuses on adhesion; Strengthener does both.\u003c\/div\u003e\n\u003cdiv class=\"faq-q\"\u003eQ: How is this different from Nail Envy?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eNatural Nail Strengthener is a base coat used during normal color manicures. Nail Envy is a treatment cycle (7-day build, then remove) used between color manicures or alone for nail recovery.\u003c\/div\u003e\n\u003cdiv class=\"faq-q\"\u003eQ: Can I use this without color polish on top?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eIt will still strengthen, but the look is mostly invisible (no color, just a slight gloss). Most shoppers use it as a base coat with color and top coat over it.\u003c\/div\u003e\n\u003cdiv class=\"faq-q\"\u003eQ: Is this the authentic OPI product?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eYes. Sourced directly from authorized US nail-supply distribution. We do not re-package, re-bottle, or source from grey markets.\u003c\/div\u003e\n\u003cdiv class=\"faq-q\"\u003eQ: Is it new and unopened?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eYes. Every bottle ships factory-sealed in original retail packaging.\u003c\/div\u003e\n\u003cdiv class=\"faq-q\"\u003eQ: How long does shipping take?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eOrders are dispatched within 1 to 2 business days. International transit to Korea typically takes 7 to 14 days depending on customs clearance.\u003c\/div\u003e\n\u003cdiv class=\"faq-q\"\u003eQ: Can I cancel my order?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eOrders can be cancelled before dispatch — usually within 24 hours of placement. Once shipped, cancellations are no longer possible.\u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails\u003e\n    \u003csummary\u003eHow to Order\u003c\/summary\u003e\n    \u003chr\u003e\n    \u003col class=\"steps\"\u003e\n\u003cli\u003eSelect the product\u003c\/li\u003e\n\u003cli\u003eAdd to cart and proceed to checkout\u003c\/li\u003e\n\u003cli\u003eEnter your Personal Customs Clearance Code (PCCC) when prompted\u003c\/li\u003e\n\u003cli\u003eConfirm your Korean delivery address\u003c\/li\u003e\n\u003cli\u003eComplete payment — your order is placed\u003c\/li\u003e\n\u003cli\u003eReceive your tracking number by email within 1 to 2 business days\u003c\/li\u003e\n\u003c\/ol\u003e\n  \u003c\/details\u003e\n\n\u003c\/div\u003e","brand":"OPI","offers":[{"title":"Default Title","offer_id":45451638800431,"sku":"NTT60","price":24000.0,"currency_code":"KRW","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0739\/5190\/3791\/files\/opi-natural-nail-strengthener-ntt60-2.png?v=1781134079","url":"https:\/\/wonjo.com\/en\/products\/opi-natural-nail-strengthener","provider":"원조 - WONJO","version":"1.0","type":"link"}