The Patagonia Capilene® 3 Midweight Girls' Bottom are made of quick-drying Polartec® Power Dry® polyester and treated to control odor. Non-chafing flat seams and a brushed interior provide soft-next-to-skin insulation. With a roomy gusseted crotch and a hidden elasticized waistband. These bottom will fit great and provide excellent warm and comfort in cold conditions.