B2-The WHOOP 4.0 SportFlex Surg Soft-Touch Silicone Wrist Band is a waterproof replacement accessory designed specifically for the Whoop brand. Made from durable silicone material, this wrist band is lightweight, non-slip, and anti-scratch, making it suitable for various activities. Its multicolor design adds a stylish touch to your device while its rugged and washable features ensure long-lasting use. Perfect for those who want a reliable and comfortable wrist band for their Whoop tracker.