Mpow Sports Armband Case, Silicone Cell Phone Armband, Sport-Fit Armband for iPhone 7, 6, 6S, Comfortable Wearing for Running Gym Workout (Dark Gray) Silicone Case Design: Fit your iphone 6s 6 seamlessly & prevent phone movement while running! Wide-open Operation: Wide-open design does not hinder touch screen use and all other buttons use. Also have precise cutouts for all ports of your iPhone 6s 6. For Any Biceps: Three pieces of high-quality extension straps, suitable for biceps range from 9.4  15.6 inches. Comfortable Wearing: Rows of grooves are made for the purpose of perspiration draining. Its breathable ! Warranty: Every Mpow Product includes a 45 days money back & 18-month worry-free!