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Available in \u003cstrong data-end=\"382\" data-start=\"358\"\u003etwo thickness levels\u003c\/strong\u003e, it adapts to changing outdoor conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-end=\"537\" data-start=\"430\"\u003e\n\u003cstrong data-end=\"456\" data-start=\"430\"\u003eMid-Warmth (5°C–15°C):\u003c\/strong\u003e Lightweight insulation that boosts warmth by +2.1°C and retains heat by 37.8%.\u003c\/li\u003e\n\u003cli data-end=\"648\" data-start=\"540\"\u003e\n\u003cstrong data-end=\"567\" data-start=\"540\"\u003eHigh-Warmth (-5°C–5°C):\u003c\/strong\u003e Enhanced thermal fibers that boost warmth by +1.9°C and lock in heat by 44.1%.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMoisture-wicking technology keeps you dry, while the slim fit and stretch construction ensure freedom of movement without bulk. Perfect for layering or wearing solo, whether you’re on the trail, camping, or in town.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eHighlights:\u003c\/strong\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-end=\"960\" data-start=\"889\"\u003eTwo warmth levels: Mid-Warmth (5°C–15°C) \u0026amp; High-Warmth (-5°C–5°C)\u003c\/li\u003e\n\u003cli data-end=\"1036\" data-start=\"963\"\u003eDual-sided brushed fleece traps heat (+2.1°C \/ +1.9°C warmth boost)\u003c\/li\u003e\n\u003cli data-end=\"1102\" data-start=\"1039\"\u003eHollow-core fibers improve heat retention (37.8% \/ 44.1%)\u003c\/li\u003e\n\u003cli data-end=\"1166\" data-start=\"1105\"\u003e360° stretch with up to 3.4× elongation, no restriction\u003c\/li\u003e\n\u003cli data-end=\"1241\" data-start=\"1169\"\u003eMoisture-wicking fibers: 521% absorption, 279.6 mm\/s breathability\u003c\/li\u003e\n\u003cli data-end=\"1301\" data-start=\"1244\"\u003eFlat-seam construction for skin 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