(New open box 4 sets of replacement bands) The Fitbit Alta Bands by Greeninsync are replacement bands designed for fitness trackers. Specifically made for gym and training activities, these large size bands come in a convenient 4-band box. The Greeninsync brand ensures quality and compatibility with the Fitbit Alta model, making these accessories a reliable choice for fitness enthusiasts looking to replace worn-out or broken bands. Perfect for those dedicated to their fitness routines, these replacement bands provide a seamless fit and reliable tracking capabilities.