The Fitbit Charge 2 Classic Accessory Band in Blue is a replacement band made of rubber, designed for gym & training activities. It features an adjustable and soft fit, as well as being water resistant. This band is specifically for the Fitbit Charge 2 model, ensuring compatibility and a secure fit during workouts. The vibrant blue color adds a pop of color to your fitness gear, while the durable material ensures longevity in your fitness routine.