High quality silicone material with smooth finish, soft and durable for a nice feeling. Strap comes with Smart Watch Lugs on both ends, locking onto your Apple Smart Watch Strap precisely and securely for easy installation and one button removal. The silicone strap is perfect for people on the go, a comfortable hassle free strap that performs anywhere. Features: Strap material: Smooth Silicone Buckle style: Stainless Steel Silver Sports Style Loop Wrist size circumference: Small-Medium: 90mm-110mm (3.54"-4.33") Medium-Large: 90mm-130mm (3.54"-5.11") Water resistance Soft against the skin Durable and easy to take on and take off Compatible With: Apple Watch Series 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, Ultra, Ultra 2, SE & SE2