Eastbay EVAPOR 8" Performance Shorts - Boys' Grade School Take your workout to the next level with the Eastbay Performance Short. Made with EVAPORô technology, this training short pulls sweat off skin to keep you cool and dry during hot gym sessions. The inner drawcord allows a personalized fit. Smooth flatlock seams reducing chafing so you stay focused on your fitness. Inseam length: M = 7.75", L = 8.5", XL = 9". Baggy fit. 84% polyester/16% spandex. Imported.