Moisture wicking 4-way stretch fabric with built in boxer brief liner. | 2-in-1 detailing features interior liner with gusset for comfort and support and flatlock seams to prevent chafing. | Mesh back yoke panel for extra breathability. | Invisible zippered pocket at side to secure your phone and additional side pockets for everything else. | Key catch pocket built into liner. | Soft elastic at interior waistband for added comfort. | Side vents for extra mobility. | Reflectivity at back yoke, exterior locker loop, interior drawcord and exterior logo.