The Nike Arm Band Plus is a practical accessory for runners and fitness enthusiasts. It securely holds your phone on your arm, allowing you to stay connected and track your progress without any hassle. The adjustable straps ensure a comfortable and secure fit, while the protective window allows you to access your phone's touchscreen and buttons. The arm band is made from a blend of materials, including neoprene, polyester, nylon, aluminum alloy, and thermoplastic polyurethane.