【Compatibility】Designed specifically Compatible with Whoop 4.0 fitness trackers, ensuring a perfect fit and optimal performance. 【Premium Material】Crafted from a blend of polyester, nylon, and spandex with zinc alloy components Compatible with durability and comfort. 【Adjustable Fit】With a wrist circumference of 150mm–232mm, this band accommodates a range of wrist sizes Compatible with personalized comfort. 【Lightweight Design】Weighing only 13.6g, this band provides a barely-there feel Compatible with all-day comfort during activities and sleep. 【Easy to Install】The strap is easy to install and remove, effortlessly giving your device a fresh new look. Specifications: ?Material: Polyester, nylon, spandex, zinc alloy ?Dimensions: 232mm x 25mm ?Wrist circumference: 150mm - 232mm ?Weight: 13.6g Compatible with: ?WHOOP 4.0 Package includes: ?1 x Wristband ?No other items included