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. Made in a Fair Trade Certified™ factory. Comfortable Elastic Waist Soft, brushed, fast-drying elastic for added next-to-skin comfort; locker loop for hang drying Internal Diamond Grid Pattern Fabric’s diamond-grid pattern next to skin provides superior warmth, breathability and moisture-wicking performance Gusseted Crotch Gusseted crotch for comfort and unimpeded mobility Flatlock Seam Construction Functional fly and flatlock seams to minimize chafing Stretchy Comfort Stretch for added comfort and improved fit during movement