We optimized the silhouette of the classic baselayer top to make the Backcountry Cedars RWS Merino Lightweight Crew Baselayer Top incredibly comfortable for the active winter adventurer. From in-bounds shredding to skintrack ascents, this top's body-mirroring fit, articulated sleeves, and chafe-free seams keep us cruising toward our 100-day season goals. We thoughtfully selected a sporty wool blend made with recycled content and Responsible Wool Standard-certified merino wool to be the best stewards we can while delivering top-notch quality and comfort. Responsible Collection: Responsibly Sourced, Recycled/Repurposed Material: 81% RWS merino wool (TE-99952623 certified by IDFL) , 12% recycled nylon, 7% spandex Insulation Weight: lightweight (180gsm) Fit: slim Center Back Length: 27in