Compatibility Designed specifically for Whoop 4.0 fitness trackers, ensuring a perfect fit and optimal performance. Premium Materials Crafted from a blend of polyester, nylon, and spandex with zinc alloy components for durability and comfort. Adjustable Fit With a wrist circumference range of 150mm–232mm, this band accommodates a variety of wrist sizes for personalized comfort. Lightweight Design Weighing only 13.6g, this band offers a barely-there feel for all-day comfort during activities and sleep. Easy Installation The strap is easy to install and remove, allowing you to refresh your device’s look quickly. Specifications: Material: Polyester, Nylon, Spandex, Zinc Alloy Dimensions: 232mm x 25mm Wrist Circumference: 150mm – 232mm Weight: 13.6g Compatible with: WHOOP 4.0 Package included: 1 x Wrist Strap