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Designed for all-day comfort on the slopes, hitting the trails or in the mountains. This midweight, long-sleeved base layer is made using seamless technology for a smooth next-to-skin feel. Perforated stretch fabric in sweat-prone areas enhances breathability as your body temperature rises. A tight fit improves moisture-wicking properties. This combines with a quick-drying, durable material (made with 76% recycled polyamide) to keep you cool and dry. The All-Mountain Seamless BL Longsleeve Mid is a reliable layer for winter adventures.