•【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 to Installation】The strap is easy to install and remove, giving your device a new look easily. 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 •Not included other items