The Nike E1 Prime Performance Arm Band allows you to train, and listen to your phone, in a range of conditions. Motivate your run with your own sounds, with the water resistant pocket fabrication, with a durable fused construction, designed for iPhone 4/4S. > Running arm band > Keeps your phone securely in place > Listen to your music during runs and workouts > Designed for iPhone 4/4S to keep securely > Durable fused construction > Water resistant pocket fabrication > Allowing you to train in all conditions > Nike Swoosh logo