Made of a lightweight and breathable material, with wicking side panel mesh and a fly opening, the Men’s Base Liner Shorts are a great foundation to wear under your favorite trail shorts. Meanwhile, added details like the soft-brushed elastic waistband and the leg gripper ensure a skin-like fit that's comfortable from the time you roll out of your driveway at dawn to when you return at dusk. 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.