Product Material: Nylon Size: 38/40/41mm, 42/44/45mm Color: black, cold sea blue, seven colors Quantity: 1 piece Package content: 1*strap 1.Quality materials Made of premium nylon,breathable and washable.Soft and comfortable feeling brings time all day. 2.Adjustable ElasticityIts a stretch bracelet wrist bands with slim plastic slider to make it could be length adjustable as you wish.Fits your wrist perfectly without constriction. 3.Flexible DesignMade from Stretchy nylon materials ,Easy to put on and off, Skin-friendly, Durable breathable and Lightweight design. 4.Daily exerciseWorks great all day-workouts and regular wear. When you exercise, this elastic band keeps your watch snugly to your wrist for better workout readings. Nots irritating to your skin when it hot out or your sweating, fits comfortably around you wrist. 5.HighlightThree colors to choose. Adjust your Watch to your mood and your outfit in everyday life. You can mix different colors of wristbands to beautify your iWatch and highlight your unique taste.