Description Our classic 6" fitted boxer brief with fly features Feather-Seam™ construction, proprietary Butter Blend™, and an exposed elastic Core-flex™ waistband to ensure maximum comfort. Butter Blend™ 6" Inseam Feather-Seam™ Construction Hidden Core-Flex™ Waistband Side Entry Fly Fit and Fabric 66% modal, 26% lyocell, 8% elastane