The Men's Base Liner Shorts are constructed with lightweight, breathable materials and moisture-wicking side-panel mesh, making them ultra-comfortable under whatever baggy shorts you choose. And to make things just a little bit easier for you, the Men's Base Liner Short features a fly opening so you can easily take care of business while you're out on the trails. - Base liner chamois - Lightweight, breathable material - Wicking side-panel mesh - Fly opening - Soft-brushed elastic waistband - Leg gripper - Formfitting - Fabric: polyester, spandex, elastane - Inseam: 9" / 22.9cm (size M)