Natuworld New Arrival for Replacement wristband Band with Secure Anti-lost Watchband-style Closure for Fitbit FLEX Only/ No tracker/ Wireless Activity Bracelet Sport Wristband / Sport Arm Band -with a secure closure around the wrist,Secure and Convenient The replacement wristband with a secure watchband-style closure to keep your Fitbit on your wrist For Fitbit Flex band ONLY!!! Not for For Fitbit One, Force or other models!!! Fitbit device not included.Replacement wistband for Fitbit Flex only!! Size: 139-220 mm/ 5.5-8.7 inches secure adjustable watchband-style closure, One size fit most