The Ares Splice Silicone Band is compatible with Apple Watches sized 38 to 42 mm. Its unique loop design ensures a smooth and comfortable fit. The ergonomic tilt of 21 degrees enhances wrist support, while the perforations provide good ventilation, making it ideal for sports or everyday use. Features and product characteristics: This band is designed for broad compatibility with Apple Watch sizes 38 to 42 mm. Unique ergonomic loop design with a 21-degree tilt for added comfort. Perforated silicone for excellent ventilation during physical activities. Closure with an integrated loop ensures a secure fit.