Specifications: Waterproof function, so you dont have to worry if you wear it to wash hands or take a shower. Replacement watch band compatible Fitbit Surge, it can make your watch have a new style. Made of high quality silicone materials, which is breathable and skin-friendly, soft and durable. With buckle, you can adjust the length according to your wrist circumstance. Item Name: Watch Strap Material: Silicone Compatible Model: compatible Fitbit Surge Features: Waterproof, Soft, Solid Color, Adjustable Width: 2.2cm/0.87" (Approx.) Thickness: 0.2cm/0.079" (Approx.) L Wrist Circumference: 5.8" - 8.7" (Approx.) S Wrist Circumference: 5.1" - 7.3" (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Watch Strap (Smart Watch Not Included) 5 x Screws 1 x Screwdriver