Two sizes available: Medium (for iPhone® 4s/4 and iPod touch® 4th Gen & similar) and Large (universally sized to fit phones and devices up to the size of iPhone 6 and Samsung Galaxy S6), the Nite Ize Action Arm Band is a durable, flexible, and sleek way to stay connected while you're hiking, running, or in the gym. Just slide your device 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; 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 microfiber construction of 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 or stitch lines to chafe or irritate your arm.