Compatible with Samsung galaxy note 8,big enough even if your device has been put into other protector case .Designed specifically to easily connect headphones and provide full access to all phone ports and sensitivity Water-resistant neoprene and PVC screen protector protect your smartphone from scratches,dirt and sweat in outdoors, installed in seconds. Designed to twist and bend but will not lose the original shape. Adjustable Velcro band supports a wide range of arm girth from 10" (25.4cm) to 15" (38.1cm). Adjustable velcro strap protects and stabilizes device without slipping or constricting.

[Accommodates Most Smaller Phone up to 5.85-inch diagonally and recommended phone screen Size up to 5-inch] Maxboost Armband is made to fit standard size of cellphone, iPhone x, iPhone 8, iPhone 7, iPhone 6s, iPhone 6, Galaxy S9, s8, s7, s6, Google Pixel and their protective slim case. Common case brands that are not compatible include Otterbox and Lifeproof. Please read the description to see complete compatibility. PREMIUM MATERIALS & Universal Sizing: Made of stretch resistant neoprene. The Maxboost Original Armband case for small smartphone easily bends, flexes, twists, and folds without warping. Multi-slot Adjustable Velcro iPhone Armband Will Fit Almost Any Arm Size Up To 14". TOUCH SCREEN COMPATIBLE: Enjoy the full use of your phone through the protective screen cover on the armband with fully touch compatible, easily answer calls, manage your playlist, or activate your stopwatch without removing the phone. Our multi portholes support for most of the phone.