Details A breathable, lofted baselayer to keep you warm in cold conditions. Polartec® Power Grid® fabric with HeiQ® Fresh durable odor control. Fair Trade Certified™ sewn. Material Solids: 3.8-oz (129-g) Polartec® Power Grid® 92% recycled polyester/8% spandex. Cross-dyes: 3.8-oz (129-g) Polartec Power Grid 92% polyester (30% recycled)/8% spandex. Both with HeiQ® Fresh durable odor control. Fabric is certified as bluesign® approved. Fair Trade Certified™ sewn Fit Slim fit Details Polartec® Power Grid® fabric with HeiQ® Fresh durable odor control has a smooth face for easy layering; fabric's open-grid pattern next to skin provides superior warmth, breathability and moisture-wicking performance Self-fabric binding at collar with internal neck tape for comfort; locker loop for hang drying Offset shoulder seams eliminate chafing under pack straps Full underarm gusset for range of motion and chafe-free comfort Elastic thumb loops for secure hand coverage Flatlock seams to minimize chafing; drop tail for increased coverage Fair Trade Certified™ sewn Weight 122 g (4.3 oz) Patagonia Capilene Thermal Weight Crew Women's