Vapor Fabric Denier graded technology Active Lining Moisture control lining with support Key Pocket Semi Split Leg Resistance free movement Low Profile Hems Reduces chaffing The mid length run short with enough side gusset for full race stride. Super light Vapor fabric will make you feel fast, comfortable, and dry. Adjustable drawstring, breathable lining, anti-rub hems, and low profile seams make this run garment an essential. Sizing Chart