With the Nite Ize Action Armband, you'll have convenient, hands-free use of your iPhone's training apps, stopwatch, maps, and iTunes library--through even your most active workouts. Durable, flexible, and sleek, the Nite Ize Action Armband securely carries the iPhone 3G, 3GS, 4, or 4S (fits iPod Touch and several other smart phone models, too) while you're hiking, running, or in the gym. Just slide your phone into the main pocket, thread the weather-resistant microfiber strap through the lightweight metal loop, press it closed around your upper arm, and go! Because the main pocket is faced with clear, touch-responsive TPU, your phone stays visible and functional as well as protected. Other design features include: strategic openings at both top and bottom for headphone access in either orientation; a rear slot to fit a driver's license, credit card, or cash; micro hook-and-loop at both pocket flap and arm strap for secure, streamlined closure; and a smaller second slit pocket with attached S-Biner for a key and Curvyman Cord Supervisor for ear buds included. Ventilated and non-absorbent, the Action Armband repels moisture, is lined with reflective detail, and backed with two narrow gripper strips to prevent slipping. Sonic welding construction ensures a flatter, smoother fit, with no seams to chafe or irritate your arm. Easily adjusts to fit arms from 10.5" - 16".