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® Mint odor control keeps things fresh. Made in a Fair Trade Certified™ factory. Features: Fabric's diamond-grid pattern next to skin provides warmth and breathability, and wicks moisture 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 Smooth, soft face makes for easy layering; HeiQ® Mint odor control keeps things fresh 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 Made in a Fair Trade Certified™ factory, which means the people who made this product earned a premium for their labor