Two Adjustable Sizes: Large size for 6.7"-8.1" wrist, Small size for 5.5"- 6.7" wrist.(Only for Fitbit Charge 2, Charge 3 is not compatible)Soft Material: These bands for fitbit charge 2 hr are made from flexible elastomer, sweat resistant & water resistant.No Worry about Falling off: These replacement wristbands for fitbit charge 2 design with metal clasps on both ends, which locks onto the charge 2 precisely and securely.Hassle Free: Simple to install and remove, no tool required.One-Year Excellent After-sales Service: Any issues with our Fitbit Charge 2 bracelet wristbands, please don't hesitate to let us know and we will fix for you within 24 hours Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia