The Runto DUO 2 waist belt with a pocket and two bottles is great for running, cycling or in-line skating. The pocket is large enough to hold your wallet, phone, keys, and documents, so that you can always keep your belongings safe with you. It also has a hole for your headphones. Their are also drawstrings to attach your race number to. The 250 ml bottles will help keep you hydrated. Elastic belt with adjustable length and a buckle for fastening.