Build & Fitness Adjustable Running Belt for Men and Women. Fits waist sizes from 28" - 40". Simply slide your phone and other items into any of the 2 opening slots. Ensure the belt is snug to your body. Clip for keys on a bright yellow elastic strap for high visibility in low light situations. Suitable for Running, Fitness, Gym Workouts, Walking, Jogging, Cycling, Climbing, Travel and Outdoor Activities.