HWHMH Colorful Silicone Replacement Secure Band with Chrome Watch Clasp and Fastener Buckle for Fitbit Alta HR and Alta - Fix the Tracker Fall Off Problem 3D Rhombic: Black, Brown, Grey, Lake Blue, Light Pink, Lime, Navy, Purple, Rose, Slate, Tangerine, Teal, White, Blue Never lose your Fitbit Alta HR and Alta. Fix the tracker fall off problem One size fits most wrists size. Designed to fit most wrists (6.0"- 8.7") Made of soft silicone material, it's more flexible,soft and supple NOTE: Replacement Band Only. No Tracker!!! Only for Fitbit Alta HR and Alta. Not for other models