Made of thin fabric (nylon) material, boasting high durability, lightness, breathability, washability, and moisture resistance. It's thin yet strong and is reportedly suitable for extended underwater use, such as showers and swimming. Installation: Can be attached by passing it through the back of the watch without using tools. It can also be attached to watches with fixed spring bars. Band Width: 22mm Thickness: Approximately 1.5mm Length: Approximately 20cm~30cm (adjustable) *The thickness and length of the belt may vary slightly depending on the individual item. Includes the band itself and a watch strap replacement tool. No instruction manual is included. Simply pass it through the back of the watch case, making it easy to replace even for beginners. A watch band with durable stainless steel hardware. Thank you for viewing.