This is the baselayer bottom you want on, when heading out for activities in the coldest conditions. The Craft Womens Warm Underpant Baselayer offers a honeycomb fabric structure that has great insulation properties thanks to a 3D-knit, sport specific layout for maximum comfort. The optimized, body-mapped fabric blend also has a seamless torso for a comfortable fit that's also chafe free. And since Craft has determined that body-mapping the body's hot spots during intense exercise allows for even more precise placement of the integrated climate zones that define this garment, you win when you've got this baselayer on. Craft Womens Warm Underpant Baselayer Specifications: Material: 61% Polyamide, 35% Polyester, 4% ElasticSeason: Cool weatherInsulation type: Synthetic Size Chart Size Small Medium Large Seat (in) 36.22"" 38.58"" 40.94"" Waist (in) 27.56"" 29.92"" 32.28"" Inside of leg length (in) 31.89"" 32.28"" 33.07""