This lightweight Nike Arm Band provides convenient storage for your phone or other device during your run. The adjustable design lets you control the fit and easy-to-use storage lets easily store your smart phone, to track your run or listen to music during your workout. 38% Neoprene, 25% Polyester, 13% Nylon, 13% Aluminum Alloy, 11% Thermoplastic Polyurethane. Pocket securely stores your phone while on a run. Adjustable design for a comfortable, personalized fit. Touch-screen compatible protective window. Earphone entry at top and bottom. Reflective swoosh detail. Fits most smart phones. Product Dimensions: 6.7 x 3.2 x 1.2 in. Product Weight: 2 oz. Spot clean. Imported. | Nike Lean Running Arm Band, Black