i2 Gear Running Exercise Armband Compatible with Galaxy S8, S6 / S6 Edge and iPhone X [Retail] (Black) COMPATIBILITY - Compatible with the Samsung S8 and S6 / S6 Edge and iPhone X phones up to 5.92 x 3.1 x .34 inches. This armband fits various arm sizes from 9 to 15 inches. An extender is available for larger sizes and is sold separately. USE - Enjoy full touch-screen control with easy access to your headphone jack. DESIGN - Our armbands are designed to deliver a comfortable fit and provide you with a snug and stable fit. Unlike lower quality armbands, this bands includes a wing band design which provide wider arm surface area coverage for additional support. This ensures support for the toughest workouts from running and weight lifting to casual walking. PREMIUM MATERIALS  This adjustable armband is made of a combination of thick high quality lycra and neoprene which delivers an uber soft and comfortable fit. SAFETY - This armband features a thick reflective strip which borders the phone for increased visilibility in low light confitions.