Nathan Sports Velocity Hydration Waistpak, Black: * Limited-stretch elasticized waistbelt * 22 oz hydration bottle * Dual XTS cradles reinforced with power stretch mesh * Insulated holster allows access from right or left side * Dual dimensional zippered pockets * Key clip * Incorporated, waterproof I.D./medical emergency card * Airmesh moisture-wicking backing * Reflective detail * Weight: 8.8 oz * Adjustable fit * Material: plastic, mesh, nylon, polyester