- Double Adjustable Velcro Armband Will Fit Any Arm Size From 8" - 16" Inches. - Universal Full Screen Coverage (perfectly fits any 5" phone). - Full Touch Screen Functionality, Along With Full Headphone Jack Support For Apple And Android Phones. - It Will Also Fit Smaller Phones With Headphone Support For Most Phones As Well. - Headphone jack port is available top and bottom for your flexibility to place your phone either way. - Made Of The Highest Quality Soft Neoprene That Is Made To Flex, Twist, And Bend But Not Stretch Out Of Shape. - Ultra Lightweight (1.5oz) For Speed And Comfort During All Activities. - Design Includes A Reflective Strip For Safe Running In Low Light Conditions. - Secure Built-in Hidden Key Holder, Perfect For House/Car Keys/Locker Key.