The new Fitbit ALTA HR Medium Orange and Silver Silicone Replacement Band is a set of two silicone bands designed for the Fitbit Alta and Alta HR models. The bands are 21.5cm in length and 15mm in width, making them suitable for activities such as Crossfit, gym training, and yoga. The medium size offers a comfortable fit, and the vibrant orange color adds a stylish touch to the fitness technology. Made by the trusted brand Fitbit, these replacement bands are a perfect choice for those looking to upgrade or replace their existing wristbands.