HopCentury Replacement Wristband for Garmin Vivofit 1 Gen, Pure Color Wrist Band Strap Accessory Kit for Garmin Vivofit 1 Gen Activity Tracker - 10 Pack For Garmin Vivofit 1 Generation Activity Tracker Only. The band is made from safe and enviromental synthetic material. The wrist watch band is cool and colored, elastic and adjustable, suitable for women and men as well. Comfortable for sporting time, looks good no matter what you are wearing. Small Size: 5.7 - 7.4 inch (14.5-19cm), Large Size: 6.8 - 8.8 inch (17.5-22.5cm), the width of both sizes are 0.78 inch (2cm), the length is adjustable. Good quality, easy for replacement.