The warmest foundational layer for winter’s coldest, most extreme conditions, refined with an ultra-high collar, additional odorControl, and a highly elastic wool blend for body-mapping insulation. Behind the product Merino wool and a highly elastic, highly insulating synthetic blend provide the most insulation of any of our skin layers, with an updated neck-warmer collar construction that extends the protection. The ultrasoft textile doesn’t irritate like wool, and its high elasticity means it also doesn’t lose its shape when it stretches. Instead, it moves with your body, maintaining a low-volume, next-to-skin fit to trap warmth and expel moisture – both of which are critical for comfort in deep winter. The finer details FEATURED FABRICSOur warmest skin layer textile, an ultrabreathable, ultrasoft blend that incorporates carbon fiber to provide permanent odorControl properties. Synthetic materials grant high stretch-and-return, while wool adds antimicrobial properties and natural thermoregulation. WHEN/HOW TO USE IT The first layer for the coldest, most extreme conditions. Pair with a standard winter jacket or the Ultraz jacket for the ultimate protection, and layer with Ultraz ASSOSOIRES as conditions require.
