Waterproof and Skin-friendly: The sport watch band compatible with universal watches uses soft and smooth silicone which is durable and lightweight. Comfortable touch feeling free your wrists when you wear the sport watch straps. Silicone Material: The replacement bands are made of soft and durable silicone breathable and washable which will prevent your skin from irritation or allergy. The silicone watch strap adopted stainless steel classic clasp which is more security stable and is easy to install and adjustable. Classic Quick Release Watchbands: You can install the strap onto your smart watch easily which is easy to adjust the size with the typical buckle is ideal for different occasions like sports or daily wear. Wrist Circumference: Fit for 5.9"-7.9" (Suitable 20mm watch band) wrist. Also it is very convenient to adjust the length to a proper fit for your wrist easy to wearmore flexible and lighter. This black watch band will lock onto your watch precisely and tightly. More Usages: The black silicone watch band replacements compatible with any universal watch. You can wear your watch when you are sporting working outing causal. Also this silicone watch straps are waterproof and anti-sweat.