Cotton kills, but your boxers shouldn't Our Mountain Hardwear eXtend Featherweight Boxers wick moisture to help you stay comfortably dry Features: You needn't smell stale at the end of the day to eXtend Featherweight, a moisture-wicking, all-polyester fabric has a silver-filament treatment to inhibit odors Stay comfy around the midsection with the brushed elastic band Don't worry about chafing underwear to all seams in the waist and hip are turned away from high-abrasion areas Specifications: Weight: 3 ounces Fabric: polyesterSpecifications based on size Medium