Compatible models: this elastic nylon strap is compatible with Fitbit Charge 4/Fitbit Charge 3 and Charge 3 Special Edition/Charge 4 Special Edition, without fitness tracker. Premium nylon material: our stretchy Fitbit Charge 3 bracelet is made of a soft and comfortable elastic nylon material. This material is non-itchy, durable, breathable and easy to clean and suitable for all day long. Fastening: Buckle Adjustable Easy to install - WNIPH nylon strap comes with a specially adapted connector for the Fitbit Charge 3/Charge 4 and can be quickly and successfully installed in 5 seconds without tools. WNIPH watch straps are strong, super stretchy and elastic. Size: the strap size is 140 mm - 210 mm (5.51 - 8.27 inches) and can be stretched to 40 cm for going out. It is suitable for a variety of wrists and the strap contains an 8-shaped loop adjustment buckle, which can be adjusted twice as required. Stylish pattern and colour - Enjoy 3 fashionable Fitbit Charge 3/Charge 4 wristbands in one pack, each colour offers you a different wearing experience. We have a variety of colours and different fashion patterns to choose from. This is a good choice for different occasions (appointments, parties, birthday parties, shopping) where your batch 4 looks different from all others and your fully demonstrates personality!