STRETCHY SUPPORT. The Nike Pro Shorts are a super-duper stretchy, supportive layer that can be worn alone, or under your shorts or uniform. Add in Dri-FIT technology and sweat has no chance. This product is made with at least 75% recycled polyester fibres. Nike Dri-FIT technology moves sweat away from your skin for quicker evaporation, helping you stay dry and comfortable. A wide elastic waistband lies flat against your skin to hold the shorts in place. More Details: Tight fit for a body-hugging feel, 4" inseam. Body: 83% polyester/17% spandex. Gusset lining: Machine wash.