Powerful compression within the 2XU Run Compression Tights with Back Storage is provided to the adductor, glute, quad, hamstring & calf, resulting in increased oxygenation, reducing the fatigue between workouts & ultimately reducing the chance of injury by up to 30%. In improving performance, 2XU hasn't compromised on comfort, with the Run Compression Tights with Back Storage featuring a drawstring waistband for a secure, tailored fit & a large rear pocket that can house a phone & keys.