A classic, all-around 100% recycled polyester baselayer. The smooth, soft face makes for easy layering. Hollow-core yarns and a diamond-grid back trap warm air, wick moisture and dry fast. HeiQ Pure odor control keeps things fresh. Fair Trade Certified sewn. Smooth, soft face makes for easy layering; HeiQ Pure odor control keeps things fresh. Zip-neck styling with internal neck tape for added comfort; locker loop for hang drying. Raglan shoulder seams allow freedom of movement, with full underarm gussets for range of motion and chafe-free comfort. Fabric's diamond-grid pattern next to skin provides warmth and breathability, and wicks moisture. Long center-front zipper vents body heat and is backed by kissing welts for low-bulk comfort next to skin. Elastic thumb loops for secure hand coverage. Fair Trade Certified sewn, which means the people who made it earned a premium for their labor.