Compatible with most smartphones, the Nike Ventilated Armband lets you securely attach your device and keep it accessible as you run. The armband features a clear window to give touch screen access as well as screen protection. It has a rip-tape closure on the pocket flap for extra security. The adjustable, perforated rip-tape strap enhances breathability and gives a personalised fit, with a strap size from 9.5-14.5 (24-38cm). The armband has a total weight of 1.2oz (34g).