Buckle closure Premium Material: This sports watch is made of upgraded odorless high quality silicone, skin friendly, sweat and water resistant, durable and lightweight, flexible, durable and colorfast, very soft and comfortable to wear. The comfortable touch frees your wrist when you use the silicone watch sports band. Perfect for workouts and everyday time, it's the perfect choice for your iWatch watch accessory. Unique Design:This strap is designed with many ventilation holes, which is lighter and more breathable. Whether you're playing sports or outdoors, our sports breathing strap allows your wrist to breathe more freely. Great for men and women sports, swimming, biking, climbing, hiking, camping, running, traveling, etc. Perfect for wedding, birthday, Valentine's Day, Mother's Day, Christmas, Thanksgiving, etc. Multiple Choices:15 popular colors sport replacement bands and 9 4-piece fits to personalize your watch. You can choose one according to your mood, dress and activity. A wide selection of colors to match perfectly with business, sports and casual wear, dress up your iWatch and show your unique taste. Compatible Models: Compatible with Apple Watch Band 38mm 40mm 41mm 42mm 44mm 45mm 49mm, for iWatch Series Ultra/8/7/6/SE/5/4/3/2/1.38mm/40mm/41mm Standard suitable for 140mm-190mm wrist; 42mm/44mm/45mm/49mm Extended suitable for 175mm-215mm wrist. Easy to install: This strap comes with buckles on both ends that lock precisely and securely onto the strap interface. Simple and straightforward installation and one-touch removal without tools.