Simple slip the waistband on like a belt, attach through the back of the DryCASE and enjoy your favorite sport while enjoying music. Great for Stand Up Paddling, Running, Swimming, Biking or anything else. You won't even know the waistband is on it's so comfortable. It's the best option for staying low profile and still having your music without hurting your performance. Stretchy Neoprene Velcro fits almost any size waist. Waterproof, Comfortable and Secure.