Weatherproof, the 2XU Run Arm Band holds your smartphone securely on your arm, fitting most contemporary phones. The band comes with an adjustable size with a Velcro fastening that ensures a comfortable fit. Care Instructions Machine wash in cold water with similar colours. Do not tumble dry. Hang to dry in a cool shady area away from the sun. Do not use bleach, fabric softeners or dryer sheets. Do not iron.