Ailzos Sports Running Armband, Cell Phone Armband Exercise Arm Holder for Running, Fitness and Gym Workouts Phone Armband Sleeve Fits iPhone X/8/7 Plus/7/6,Samsung Galaxy S9/S8/S7,Sony,LG HTC, Black,L The sports running armband belt is made of a quick-drying 85% polyester and 15% spandex material,so it's flexible and lightweight,easy to fit on your arm,giving you ultimate comfort without constriction.It's not as heavy as the other phone armbands, and it will not rub your skin when you are exercising. The storage space is large enough to fit into any size phone with slim-line case(up to 6-inch),such as iPhone X/iPhone 8/iPhone 8 Plus/iPhone7/iPhone7 Plus/iPhone6/6s/Samsung Galaxy S9/S8/S7/S6/Edge/Plus & LG,Huawei,Google,Sony,LG HTC Pixel etc.It can even fit more stuff besides your phone,just like credit card, ID, cash, coins,mobile keys and more. Simple and ultra-slim design,lightweight and no bulky feeling when wearing it.This is portable and concise style phone armband sleeve with delicate design & master craftsmanship.It has a opening,which could also make sure your phone or credit card firmly and safety,you can run your headphone cord through this opening as well,and it's easy to be carried wherever you go. If you are going on running,weight lifting,hiking,dog walking,gardening or visiting an amusement park or any other sports and don't want to be disturbed by the stuff on your body,it could keep you from having to carry items in your pocket and keep your hands free.It won't take long for you to find that this armband is the perfect solution for this issue. Suitable for most arms,in order to fit your arms better and don't need to readjust or worry about slipping during physical activity,please measure your circumference of bicep to find out which size is best for you. SMALL: 18-25 cm / 7.10"-9.84", MEDIUM: 25-30 cm / 9.84"-11.8", LARGE: 30-37 cm / 11.8"-14.6". We recommend that if you are between sizes to choose larger size for a comfortable and fashion fit.