The Silicone Replacement Wristband Strap with Buckle for Fitbit Alta OS in blue is a high-quality accessory designed specifically for the Fitbit Alta model. Made of durable rubber material, this adjustable wristband is suitable for gym & training activities. The sleek design and secure buckle closure make it a practical and stylish choice for fitness enthusiasts looking to customize their Fitbit experience. Compatible with the Fitbit brand and designed by Weltin, this wristband is a perfect replacement or addition to your fitness tech setup.