Athlete&rsquo;s Choice Neoprene Workout Armband for OnePlus 2 / OnePlus One Smartphones, Black VG Durable Neoprene Armband cushions and protects your phone against any rigorous hardcore workout Reinforced high-grade plastic interior prevents any moisture build up from accumulating on your phone 2-piece adjustable Touch fastener straps extend from 16.5 in to 22 inches, Designed to fit Small and Large Arms Touch fastener strap to secure excess headphone cord // Key Slot allows you to carry your car key or locker key