Compatible Models elastic nylon scrunchies watch band is Compatible with Charge 4 / Charge 4 Special Edition /Charge 3 /3 SE smartwatch. (Fitbit Smartwatch is NOT Included )Premium Material: Made of durable, breathable and skin-friendly elastic nylon woven polyester nylon. Innovative pattern,soft and comfortable feeling brings good time all day.One Size fit Most: With adjustable buckle, ajustable one size design could perfectly fit for most wrist size. Fit for 6.4 to 10 (165mm to 255mm) wrist, with strong super stretchy elastic, easy to assemble and resize. No longer worry about falling off your Fitbit Charge 3 smart watch.Stylish Design: Fashionable pattern and unique buckle design not only can double hold your Fitbit Charge 4 / Charge 3 bands in the place securely, but also decorate your watch and highlight your taste in daily lifeIdeal Watch Accessory: Multiple fashionable colors for you to choose. You can select the right color according to different occasions. With a simple change, the replacement strap is very suitable for men and women to sports, parties, business, sleeping or other activities