iPhone X/Xs Armband, JEMACHE Water Resistant Gym Run Workout Arm Band for Apple iPhone X/Xs (5.8") Exercise Cell Phone Holder Case (Black) PREMIUM MATERIALS: Made of stretch resistant neoprene that makes the armband case easily bends, flexes, twists, and folds without warping. The band supports a wide range of arm girth from 8.7" (22cm) to 15.7" (40cm). Additional 6.3"(16cm) extender makes the armband fit varies of arm lengths. Adjustable strap protects and stabilizes device without slipping or constricting. SPECIAL FEATURES: Extra needlework around the armband makes it stronger even strenuous exercises. Obvious and clear power and volume button pattern printing, it helps you press button easily. Built-in key pocket stores your house key while exercising. Rear pocket is for storing ID, Credit Card, and Cash. DELICATE CUTOUTS & REFLECTIVE STRIP : The three cutout holes behind the armband are designed for headphone/USB cable to easily access to phone. The armband is printed a reflective strip to keep visible in low light conditions. 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. UNIVERSAL ARMBAND: Exquisitely designed engineered for iPhone X, Samsung Galaxy S9/S8/S7 Edge. It is big enough even if your device has been put into protective case.(Not compatible with OtterBox DEFENDER series, Lifeproof Case) Q1: Is there an opening to plug in earphones? Yes, there is 3 cutouts on the bottom. Q2:  Will this armband fits the iPhone XS/X with an OtterBox/Lifeproof case on? This armband fits easily the phone with a normal case on, if you have a large phone case such as OtterBox DEFENDER SERIES or Lifeproof case, we suggest you can choose the color: &#034;Black (Fit OtterBox)&#034;. Q3: Does the Face ID sensor work through the plastic? Yes, it works. Q4: What is the material of the band, what is the feature of this material? The material of the band is lycra neoprene fabric, it is 80% softer and 40% less elastic than elastic polyurethane fabric.