[Bands Compatibility for Apple Watch] : applicable to all versions of Apple Watch suitable for 5.6"-7.1" (140-180mm) wrist; ✔42mm/44mm/45mm/49mm is suitable for 6.2"-8.3"（160-210mm) wrist. [Premium Nylon Material]: This apple watch sport band is woven from high quality nylon, to make the skin-contact side of band smooth and breathable without causing any strain. Sweat resistant and durable, no matter how many times you wash it, you don't have to worry about deformation. [Security & Easy to Install]:These nylon breathable apple watch bands lugs on both ends, which locks onto watch precisely and securely. It can effectively prevent the sport bands from falling off and becoming loose. Don't need any tools, easy to install and remove. [All Scene]The bands for ultra apple watch band fit for many indoor and outdoor activities, such as casual,travel,working,sport,cycling,camping,adventures,etc.You can wear the apple ultra watch band everywhere,outdoor,gym,beach,and so on.