The Patagonia Capilene Midweight Zip Neck delivers the perfect balance of warmth, breathability, and versatility that makes it your go-to base layer for everything from dawn ski tours to afternoon winter hikes. Crafted from 100% recycled polyester with innovative diamond-grid construction, this women's base layer traps warm air close to your body while actively wicking moisture away during high-output activities. The zip neck design lets you fine-tune your temperature on the fly, venting excess heat when you're working hard and sealing in warmth during rest stops, while raglan shoulders and underarm gussets move with you whether you're reaching for the next hold or shouldering a pack. Built with Fair Trade Certified manufacturing and HeiQ Mint odor control technology, this slim-fitting base layer keeps you comfortable and fresh through multi-day adventures while supporting both environmental and social responsibility.