Compatible Models -- adjustable watch strap is specially designed compatible with Fitbit Versa 4/Fitbit Versa 3/Fitbit Sense/Fitbit Sense 2. (Note: Only strap included) Premium Material -- Our elastic nylon straps are are made of high quality nylon material, soft, lightweight, breathable, durable, very comfortable to wear. Free size fit for boys, girls, men and women in most occasions. Adjustable Size -- The watch strap is designed with an adjustable buckle, allowing you to freely adjust the length to fit your wrist. Installation and removal are very simple. Suitable for wrists with a size of 5.5- 9.8(140mm-250mm). Multiple Choices -- 3 packs woven straps come with a variety of colors for you to choose from. Start the day with a strap that suits your mood and clothing. Suitable for sports, business, daily life, parties and other occasions. Quality Service -- We provide 12 months warranty guaranty. Unconditionally refund or free replace if defective or any quality problems. Please rest assured to buy.