Whether you wear it under your ski shell on teeth-chattering days or over a baselayer on cold-weather hikes, the Women’s Helix Long Sleeve Zip Hood provides technical, sustainable warmth when you need it most. This hybrid midlayer features a 100% recycled polyester shell as well as stretch side panels to improve mobility and regulate body temperature. Inside the Helix, we used our innovative 70gm MerinoLOFT insulation, a sustainable and high-lofting alternative to synthetic fills made from all-natural merino wool (up to 10% of which is recycled). MerinoLOFT retains warmth even when wet and naturally helps regulate body temperature to keep you comfortable. Zippered hand pocket store cold hands and small essentials.