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.Details: Smooth, soft face makes for easy layering; HeiQ® Pure odor control keeps things fresh Diamond-grid pattern next to skin provides superior warmth, breathability and moisture-wicking performance Gusseted crotch for comfort and unimpeded mobility Soft, brushed, fast-drying elastic is sewn into wide waistband for added next-to-skin comfort and improved fit; locker loop for hang drying Flatlock seams to minimize chafing Stretch for added comfort and improved fit during movement Fair Trade Certified™ sewn Made in Sri Lanka Patagonia style# 44492