For Apple iWatch Adjustable Integrated Silicone Replacement Watch Strap 38/40mm Features: Compatible with iWatch strap 38 mm / 40 mm: The high-quality silicone strap is suitable for watch sizes of 38 mm and 40 mm. The smart strap is compatible with Apple Watch SE Series 6 Series 5 Series 4 (40mm), Series 3 Series 2 Series 1 (38mm) Comfortable and breathable: The replacement strap is made of high-quality elastic silicone. Silicone is a light and soft material, which is different from heavy metals. This type of material is lightweight, keeps the bracelet dry during exercise, and is friendly to the skin. Easily adjust size: The sports strap is suitable for wrist sizes from 152 mm to 223 mm. It has a strong elastic band that is easy to put on and take off. At the same time, you can adjust the length of the strap according to the size of your wrist. Quick installation: Quick and easy to install. Slide in-slide out installation No additional tools are required. The sports ring is suitable for many occasions, including swimming, fitness, running, camping, mountain climbing, hiking, parties and daily wear. Material: Silicone Application: Apple Watch Series 6/SE/5/4/3/2/1 38/40mm Length: 152 mm to 223 mm Include : 1x watch belt