Nike Pocket Arm Band Plus properties: phone strap, adjustable shoulder strap with Velcro closure, zippered pocket, additional compartment inside, reflective logo, size: universal. Dimensions of the phone compartment: height: 15 cm, width: 7 cm. Composition: 41% nylon, 33% polyester, 19% polyurethane, 5% elastane, 2% zinc alloy. Color: black. The Pocket Arm Band Plus running armband lets you use your mobile device while training. The zippered pocket has two compartments for safe storage of small items. It features a transparent protective window adapted to touch screens. The adjustable strap allows for an optimal fit, and reflective details help you stand out.