A classic, all-around 100% recycled polyester baselayer bottom. 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. Nothing compares to the odour control of merino base layers, but after being treated with the HeiQ anti-odour treatment these 100% synthetic thermals do a good job of keeping you stench free. Features Smooth, soft face makes for easy layering; HeiQ® Pure odor control keeps things fresh Soft, brushed, fast-drying elastic is sewn into wide waistband for added next-to-skin comfort and improved fit; locker loop for hang drying Gusseted crotch for comfort and unimpeded mobility Diamond-grid pattern next to skin provides warmth, breathability and wicks moisture Stretch for added comfort and improved fit during movement 4.3-oz (147-g) 100% recycled polyester diamond-grid double knit with miDori™ bioSoft for added wicking and softness, and HeiQ® Pure odor control Patagonia Womens Capilene Mid Weight Bottoms