Nike Race Day Waistpack Properties: elastic running belt adjustable strap allows for a perfect fit reflective Swoosh logo zippered pocket belt dimensions: 82 cm pocket dimensions: 20 cm x 10 cm material: 64% nylon / 36% polyester color: black Designed with the needs of runners in mind, the Nike waist bag features a full-width pocket on the front for storing storing sleeves, phone, keys or other essentials as the race heats up. Adjustable stoppers allow you to securely attach your starting number.