Suitable for most situations: Armtrek Pro is specially designed to increase the space and can easily accommodate most large mobile phones, including Galaxy Note 9 8 / Galaxy S10, S10+, S10e, S9+ S8+ / iPhone XR, XS, XS Max, X 8 Plus / 7 Plus / 6s Plus and its protective cover. Common shell brands that are compatible include Otterbox/Lifeproof. Please read the instructions to see complete compatibility. High-quality materials and general dimensions: made of stretch-resistant neoprene. The Trianium ArmTrek Armband case is suitable for large smartphones and can be easily bent, bent, twisted and folded without warping. The multi-slot adjustable Velcro iPhone armband fits almost any size arm, up to 14 inches. Compatible with touch screen: Enjoy the full use of the phone through the protective screen cover on the armband. It is fully compatible with touch, making it easy to answer calls, manage playlists or activate the stopwatch without having to take out the phone. Extra function: Waterproof design can prevent water and sweat. Built-in key pocket; the secret compartment can store your house keys during exercise. During exercise and running, the comfortable grip can hold the strap firmly on your arm. The headset and charger cutouts allow direct access to the phone through the armband. Note: Compatible with solid-state home button (cannot read fingerprints) and Lightning headphone jack)