SumacLife Adjustable Neoprene Running Sports Armband Case for Blackberry Z 10 / Q 10 (Blue) SumacLife hardcore workout armband with key slot and earphone cord excess holder Provide excellent protection during sport, such as running, biking, jogging, walking, working out etc. Adjustable Touch fastener arm strap. Arm strap dimensions: 11' - 16' in. Keeps device dry while being active with sweat proof feature. Compatible with:4-5 inch smartphones