Versatile Compatibility Designed specifically for Whoop 4.0, ensuring a perfect fit and seamless integration with your device. Comfortable Elastic Design Features a one-piece elastic band with a D-ring buckle for easy adjustment and secure fastening. Premium Materials Crafted from durable polyester, offering both flexibility and strength. Adjustable Fit Accommodates a wide range of wrist sizes from 150mm to 290mm, ensuring a comfortable fit for most users. Lightweight Comfort With a light weight, this band provides a barely-there feel for all-day wear. Specifications: Material: Polyester and PC Dimensions: 290mm x 22mm Wrist Circumference Range: 150mm - 290mm Weight: 11.3g Compatible with: WHOOP 4.0 Package included: 1 x Watch Strap