{"product_id":"womens-ultra-thin-thermal-underwear-set-37c","title":"Ultra-Thin 37°C Thermal Underwear Set for Women – Seamless Warm Base Layer","description":"\u003ch2\u003e🧣 Warmth You Can't See — Comfort You'll Feel All Day\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eUltra-Thin 37°C Thermal Underwear Set\u003c\/strong\u003e works with your body, not against it. The 37°C technology reflects your own body heat back toward your skin, maintaining that ideal warmth zone without any of the bulk of traditional thermals. Slip it on under your favorite outfit and forget it's there — no visible lines, no extra layers showing through, just consistent, invisible warmth from morning commute to evening unwind.\u003c\/p\u003e\n\n\u003ch2\u003e✨ Why You'll Love It\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e🌡️ \u003cstrong\u003e37°C Body-Heat Technology\u003c\/strong\u003e — Reflects your natural body warmth to maintain the ideal thermal comfort zone all day\u003c\/li\u003e\n\u003cli\u003e👤 \u003cstrong\u003eInvisible Under Clothes\u003c\/strong\u003e — Ultra-thin profile means zero bulk, zero VPL — wear under anything from office wear to winter coats\u003c\/li\u003e\n\u003cli\u003e🧵 \u003cstrong\u003eSeamless Construction\u003c\/strong\u003e — No seams, no tags, no friction — comfortable enough to wear directly against skin all day\u003c\/li\u003e\n\u003cli\u003e🧠 \u003cstrong\u003e4-Way Stretch Fabric\u003c\/strong\u003e — Moves with every bend, stretch, and step — perfect for desk work, commuting, or light activity\u003c\/li\u003e\n\u003cli\u003e👗 \u003cstrong\u003eComplete Matching Set\u003c\/strong\u003e — Long-sleeve top + full-length leggings included — one purchase, full warmth coverage\u003c\/li\u003e\n\u003cli\u003e🎨 \u003cstrong\u003e6 Color Options\u003c\/strong\u003e — Grey, Beige, Black, Pink, Purple, Claret — designed to disappear under any wardrobe\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003e📊 Size Guide\u003c\/h2\u003e\n\u003cdiv style=\"display:flex;flex-direction:column;gap:8px;margin:16px 0;\"\u003e\n  \u003cdiv style=\"display:flex;align-items:center;gap:12px;background:#f0f8ff;border-left:4px solid #42a5f5;border-radius:10px;padding:12px 16px;\"\u003e\n    \u003cdiv style=\"font-weight:700;min-width:36px;color:#1565c0;\"\u003eS\u003c\/div\u003e\n    \u003cdiv style=\"font-size:13px;color:#444;\"\u003eHeight 155–160cm  |  Weight 45–55kg  |  Bust 80–88cm\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display:flex;align-items:center;gap:12px;background:#f1f8f0;border-left:4px solid #66bb6a;border-radius:10px;padding:12px 16px;\"\u003e\n    \u003cdiv style=\"font-weight:700;min-width:36px;color:#2e7d32;\"\u003eM\u003c\/div\u003e\n    \u003cdiv style=\"font-size:13px;color:#444;\"\u003eHeight 160–165cm  |  Weight 55–65kg  |  Bust 88–96cm\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display:flex;align-items:center;gap:12px;background:#fff8e1;border-left:4px solid #ffb300;border-radius:10px;padding:12px 16px;\"\u003e\n    \u003cdiv style=\"font-weight:700;min-width:36px;color:#e65100;\"\u003eL\u003c\/div\u003e\n    \u003cdiv style=\"font-size:13px;color:#444;\"\u003eHeight 165–170cm  |  Weight 65–75kg  |  Bust 96–104cm\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display:flex;align-items:center;gap:12px;background:#fce4ec;border-left:4px solid #e91e63;border-radius:10px;padding:12px 16px;\"\u003e\n    \u003cdiv style=\"font-weight:700;min-width:36px;color:#880e4f;\"\u003eXL\u003c\/div\u003e\n    \u003cdiv style=\"font-size:13px;color:#444;\"\u003eHeight 170–175cm  |  Weight 75–85kg  |  Bust 104–112cm\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003e🎨 Choose Your Color\u003c\/h2\u003e\n\u003cdiv style=\"display:flex;gap:10px;flex-wrap:wrap;margin:16px 0;\"\u003e\n  \u003cdiv style=\"flex:1;min-width:100px;border:2px solid #9e9e9e;border-radius:12px;padding:12px 8px;text-align:center;background:#fafafa;\"\u003e\n    \u003cdiv style=\"font-size:20px;margin-bottom:3px;\"\u003e🩶\u003c\/div\u003e\n    \u003cdiv style=\"font-size:12px;font-weight:700;color:#616161;\"\u003eGrey\u003c\/div\u003e\n    \u003cdiv style=\"font-size:11px;color:#888;margin-top:2px;\"\u003eNeutral \u0026amp; versatile\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"flex:1;min-width:100px;border:2px solid #d4b896;border-radius:12px;padding:12px 8px;text-align:center;background:#fdf8f3;\"\u003e\n    \u003cdiv style=\"font-size:20px;margin-bottom:3px;\"\u003e🤍\u003c\/div\u003e\n    \u003cdiv style=\"font-size:12px;font-weight:700;color:#8d6e63;\"\u003eBeige\u003c\/div\u003e\n    \u003cdiv style=\"font-size:11px;color:#888;margin-top:2px;\"\u003eMost invisible under light clothes\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"flex:1;min-width:100px;border:2px solid #212121;border-radius:12px;padding:12px 8px;text-align:center;background:#f5f5f5;\"\u003e\n    \u003cdiv style=\"font-size:20px;margin-bottom:3px;\"\u003e🖤\u003c\/div\u003e\n    \u003cdiv style=\"font-size:12px;font-weight:700;color:#212121;\"\u003eBlack\u003c\/div\u003e\n    \u003cdiv style=\"font-size:11px;color:#888;margin-top:2px;\"\u003ePerfect under dark outfits\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"flex:1;min-width:100px;border:2px solid #f48fb1;border-radius:12px;padding:12px 8px;text-align:center;background:#fff0f5;\"\u003e\n    \u003cdiv style=\"font-size:20px;margin-bottom:3px;\"\u003e🩷\u003c\/div\u003e\n    \u003cdiv style=\"font-size:12px;font-weight:700;color:#c2185b;\"\u003ePink\u003c\/div\u003e\n    \u003cdiv style=\"font-size:11px;color:#888;margin-top:2px;\"\u003eSoft \u0026amp; feminine\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"flex:1;min-width:100px;border:2px solid #9c6fc5;border-radius:12px;padding:12px 8px;text-align:center;background:#f8f0ff;\"\u003e\n    \u003cdiv style=\"font-size:20px;margin-bottom:3px;\"\u003e💜\u003c\/div\u003e\n    \u003cdiv style=\"font-size:12px;font-weight:700;color:#6a1b9a;\"\u003ePurple\u003c\/div\u003e\n    \u003cdiv style=\"font-size:11px;color:#888;margin-top:2px;\"\u003eBold \u0026amp; elegant\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"flex:1;min-width:100px;border:2px solid #8b1a2f;border-radius:12px;padding:12px 8px;text-align:center;background:#fdf0f2;\"\u003e\n    \u003cdiv style=\"font-size:20px;margin-bottom:3px;\"\u003e❤️\u003c\/div\u003e\n    \u003cdiv style=\"font-size:12px;font-weight:700;color:#8b1a2f;\"\u003eClaret\u003c\/div\u003e\n    \u003cdiv style=\"font-size:11px;color:#888;margin-top:2px;\"\u003eRich wine red warmth\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003e📦 Specs \u0026amp; What's in the Box\u003c\/h2\u003e\n\u003cdiv style=\"display:flex;gap:16px;flex-wrap:wrap;margin:16px 0;\"\u003e\n  \u003cdiv style=\"flex:1;min-width:220px;border:1px solid #e0e0e0;border-radius:12px;padding:20px;background:#fafafa;\"\u003e\n    \u003cdiv style=\"font-size:1em;font-weight:bold;color:#333;margin-bottom:12px;\"\u003e🔧 Technical Specs\u003c\/div\u003e\n    \u003ctable style=\"width:100%;font-size:13px;border-collapse:collapse;\"\u003e\n      \u003ctbody\u003e\n        \u003ctr style=\"border-bottom:1px solid #eee;\"\u003e\n\u003ctd style=\"padding:6px 4px;color:#888;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"padding:6px 4px;font-weight:600;\"\u003eUltra-Thin Thermal Base Layer Set\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr style=\"border-bottom:1px solid #eee;\"\u003e\n\u003ctd style=\"padding:6px 4px;color:#888;\"\u003eTechnology\u003c\/td\u003e\n\u003ctd style=\"padding:6px 4px;font-weight:600;\"\u003e37°C body-heat reflection\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr style=\"border-bottom:1px solid #eee;\"\u003e\n\u003ctd style=\"padding:6px 4px;color:#888;\"\u003eConstruction\u003c\/td\u003e\n\u003ctd style=\"padding:6px 4px;font-weight:600;\"\u003eSeamless, 4-way stretch\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr style=\"border-bottom:1px solid #eee;\"\u003e\n\u003ctd style=\"padding:6px 4px;color:#888;\"\u003eSizes\u003c\/td\u003e\n\u003ctd style=\"padding:6px 4px;font-weight:600;\"\u003eS \/ M \/ L \/ XL\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd style=\"padding:6px 4px;color:#888;\"\u003eColors\u003c\/td\u003e\n\u003ctd style=\"padding:6px 4px;font-weight:600;\"\u003eGrey \/ Beige \/ Black \/ Pink \/ Purple \/ Claret\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"flex:1;min-width:220px;border:1px solid #e0e0e0;border-radius:12px;padding:20px;background:#fafafa;\"\u003e\n    \u003cdiv style=\"font-size:1em;font-weight:bold;color:#333;margin-bottom:12px;\"\u003e📦 Package Includes\u003c\/div\u003e\n    \u003cul style=\"font-size:13px;color:#444;line-height:2;padding-left:18px;margin:0 0 16px;\"\u003e\n      \u003cli\u003e\n\u003cstrong\u003e1 ×\u003c\/strong\u003e Long-Sleeve Thermal Top\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003e1 ×\u003c\/strong\u003e Full-Length Thermal Leggings\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \u003cdiv style=\"padding:12px;background:#e8f5e9;border-radius:8px;font-size:12px;color:#2e7d32;\"\u003e💡 \u003cstrong\u003eTip:\u003c\/strong\u003e If you're between sizes, size up for a looser layering fit or stay true to size for a closer, warmer fit against the skin.\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eHow does the 37°C technology actually work?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eThe fabric contains micro-fibers that reflect infrared body heat back toward your skin, maintaining your natural warmth zone around 37°C without active heating. Unlike electric or chemical heating, it uses only your body's own heat — making it safe, lightweight, and power-free.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eCan I wear this under fitted clothing without it showing?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eYes — the ultra-thin seamless construction is specifically designed to disappear under clothing. The smooth surface eliminates visible lines under fitted tops, trousers, and dresses. Beige is the most invisible option under light-colored clothing.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eHow do I wash and care for this set?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eMachine wash cold on a gentle cycle using mild detergent. Avoid bleach and fabric softener, which can degrade the thermal fiber technology. Air dry flat or tumble dry on low — do not iron directly on the thermal layer.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eWhich color is best for wearing under light-colored clothes?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eBeige (nude) is the most invisible option under light or white garments. Grey works well under mid-tones, while Black is ideal under dark outfits. Pink, Purple, and Claret are perfect choices when you prefer a pop of color in your base layer.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003ch2\u003e🧣 Complete Your Winter Wardrobe\u003c\/h2\u003e\n\u003cdiv style=\"display:flex;gap:16px;flex-wrap:wrap;margin:16px 0;\"\u003e\n  \u003cdiv style=\"flex:1;min-width:180px;max-width:260px;border:1px solid #e0e0e0;border-radius:12px;padding:18px;text-align:center;background:#fafafa;\"\u003e\n    \u003cdiv style=\"font-size:2em;margin-bottom:8px;\"\u003e👙\u003c\/div\u003e\n    \u003cdiv style=\"font-weight:700;font-size:0.95em;margin-bottom:6px;\"\u003eWomen's Fashion\u003c\/div\u003e\n    \u003cdiv style=\"font-size:0.85em;color:#555;margin-bottom:12px;\"\u003eBrowse our full women's apparel and accessories collection for every season.\u003c\/div\u003e\n    \u003ca href=\"\/es\/collections\/elegance-at-daily\" style=\"color:#2e7d32;font-weight:600;font-size:0.85em;text-decoration:none;\"\u003eShop Now →\u003c\/a\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"flex:1;min-width:180px;max-width:260px;border:1px solid #e0e0e0;border-radius:12px;padding:18px;text-align:center;background:#fafafa;\"\u003e\n    \u003cdiv style=\"font-size:2em;margin-bottom:8px;\"\u003e🎒\u003c\/div\u003e\n    \u003cdiv style=\"font-weight:700;font-size:0.95em;margin-bottom:6px;\"\u003eMountaineering Backpack\u003c\/div\u003e\n    \u003cdiv style=\"font-size:0.85em;color:#555;margin-bottom:12px;\"\u003eLayer up and gear up — the perfect companion for cold-weather outdoor adventure.\u003c\/div\u003e\n    \u003ca href=\"\/es\/products\/outdoor-mountaineering-backpack-molle\" style=\"color:#2e7d32;font-weight:600;font-size:0.85em;text-decoration:none;\"\u003eExplore →\u003c\/a\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"flex:1;min-width:180px;max-width:260px;border:1px solid #e0e0e0;border-radius:12px;padding:18px;text-align:center;background:#fafafa;\"\u003e\n    \u003cdiv style=\"font-size:2em;margin-bottom:8px;\"\u003e🏠\u003c\/div\u003e\n    \u003cdiv style=\"font-weight:700;font-size:0.95em;margin-bottom:6px;\"\u003eHome \u0026amp; Lifestyle\u003c\/div\u003e\n    \u003cdiv style=\"font-size:0.85em;color:#555;margin-bottom:12px;\"\u003eStay cozy at home too — explore our curated home comfort collection.\u003c\/div\u003e\n    \u003ca href=\"\/es\/collections\/decoration-with-love\" style=\"color:#2e7d32;font-weight:600;font-size:0.85em;text-decoration:none;\"\u003eBrowse All →\u003c\/a\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"background:linear-gradient(135deg,#e8eaf6,#e3f2fd);padding:16px 20px;border-radius:12px;text-align:center;font-weight:700;color:#1a237e;\"\u003e❄️ Stay warm without the layers — feel the difference from the very first wear. 🧣\u003c\/p\u003e","brand":"TaoJ Trade","offers":[{"title":"Grey","offer_id":43530762256445,"sku":"1775120496570970117","price":19.6,"currency_code":"USD","in_stock":true},{"title":"Beige","offer_id":43530762289213,"sku":"1775120496570970112","price":19.6,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":43530762321981,"sku":"1775120496570970113","price":19.6,"currency_code":"USD","in_stock":true},{"title":"Pink","offer_id":43530762354749,"sku":"1775120496570970114","price":19.6,"currency_code":"USD","in_stock":true},{"title":"Purple","offer_id":43530762387517,"sku":"1775120496570970115","price":19.6,"currency_code":"USD","in_stock":true},{"title":"Claret","offer_id":43530762420285,"sku":"1775120496570970116","price":19.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0638\/8285\/4461\/files\/beige-thermal-set-back-view-curtain.png?v=1788159992","url":"https:\/\/ifuli.com\/es\/products\/womens-ultra-thin-thermal-underwear-set-37c","provider":"TaoJ Trade","version":"1.0","type":"link"}