A breathable, lofted baselayer to keep you warm in cold conditions. PolartecA(R) Power GridA(R) fabric with HeiQA(R) Fresh durable odor control. Fair Trade Certified(TM) sewn. Features Warm, Comfortable Fabric: PolartecA(R) Power GridA(R) fabric with HeiQA(R) 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 Zip-Neck: Self-fabric backing on collar with internal neck tape for comfort; locker loop for hang drying Offset Shoulder Seams: Offset shoulder seams eliminate chafing under pack straps Deep Center-Front: Zipper Long center-front zipper vents body heat and is backed by kissing welts for low-bulk comfort next to skin Motion-Friendly Underarm Gussets: Full underarm gusset for range of motion and chafe-free comfort Low-Profile Thumb Loops: Elastic thumb loops for secure hand coverage Flatlock Seam Construction: Flatlock seams to minimize chafing; drop tail for increased coverage; Fair Trade Certified(TM) sewn Country of Origin: Made in Colombia. Weight 175.8 g (6.2 oz) Materials: 3.8-oz (129-g) PolartecA(R) Power GridA(R) 92% recycled polyester/8% spandex with HeiQA(R) Fresh durable odor control Fabric is certified as bluesignA(R) approved Fair Trade Certified(TM) sewn