BREATHABLE AND LIGHTWEIGHT, READY TO RACE. Designed for racing, the Nike Fast Shorts are lightweight and perforated to help you stay cool on the run. Pockets keep your essentials close, while split vents let you push through your stride without distraction. Quick-Dry Support Nike Dri-FIT technology moves sweat away from your skin for quicker evaporation, helping you stay dry and comfortable. Ventilated Comfort Woven fabric is perforated for breathability. Elastic waistband with a drawcord lets you adjust the fit. Built to Move A split vent goes all the way to the waistband, helping you move freely through your stride. More Benefits Designed for Racing Length: 2" Liner: Knit liner Fabric: Lightweight woven Storage: Internal key pocket Waistband: Elastic with drawcord