Premium material: made of liquid silicone rubber, easy to clean, has good elasticity, water and moisture resistance. Soft and comfortable and it would be more durable than other full silicone bands. The metal buckle and adapter are made of high quality 316L stainless steel. Compatible models: the sports strap made of liquid silicone rubber compatible with Apple Watch Ultra 2 strap, for Apple Watch Ultra strap, for Apple Watch Series 10 46 mm, for Apple Watch Series 9 8 7 45 mm, for Apple Watc Series 6/5/4/SE 44 mm, for Apple Watc Series 3/2/1 42 mm. Fits wrists with a circumference of 14-22 mm. design: the latest design of the silicone rubber strap for Apple Watch takes the iWatch Ultra 2 strap to a whole new level, luxurious,and presents elegant taste, silicone strap with sharp lines, meticulous craftsmanship. Non-slip design and safety: stainless steel clasp. The elastic band for Apple Watch Ultra is equipped with a locking slot that effectively prevents the band from slipping. The stainless steel clasp is safe and durable. It offers you a perfect wearing experience. Enjoy exploring nature: If you enjoy outdoor explorations such as running, hiking, mountaineering or riding, this watch strap is the ultimate answer to demonstrate your robustness and robust charm.