Fabric: 100% GOTS certified organic cotton rib that's free of toxic chemicals, making it kind on the skin & the planet — read more here; pre-washed to minimize shrinkage. Feel: Super soft and naturally stretchy. Learn more. Fit: Functional drawstring. Unisex sizing; use the size chart for specifics or this general rule of thumb—bottoms run true to size for all, tops run large and should be sized down if you prefer them more fitted. This garment is not flame resistant, and should fit snugly for safety; loose-fitting garments are more likely to catch fire.