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. Features and Specifications Our Most Versatile Baselayer: Smooth, soft face makes for easy layering; HeiQ® Pure odor control keeps things fresh 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 Supporting the People Who Made This Product: Fair Trade Certified™ sewnCountry Of Origin Made in Sri Lanka:  Weight: 164 g (5.8 oz) Materials: 4.3-oz (147-g) 100% recycled polyester diamond-grid double knit with miDori™ bioSoft for added wicking and softness, and HeiQ® Pure odor controlFabric is certified as bluesign® approvedFair Trade Certified™ sewnStretch for added comfort and improved fit during movement Patagonia Men's Capilene Midweight Bottoms Thermal Underwear - 44487