The Nike Flex Men's 8"(20.5cm approx.) Training Shorts help keep you dry, cool and moving freely during your most intense training sessions. Move Freely A shorter 8"(20.5cm approx.) inside leg combines with Nike Flex fabric to let you move freely whether you're running, jumping or lifting. Stay Cool Side perforations and sweat-wicking Dri-FIT technology help keep you dry, cool and comfortable even as your workout heats up. Repel Rain Ultralight, water-repellent fabric helps protect from light rain without sacrificing breathability.