CompatibilityDesigned specifically for Whoop 4.0 fitness trackers, ensuring a perfect fit and optimal performance. Premium MaterialsCrafted from a blend of polyester, nylon, and spandex with zinc alloy components for durability and comfort. Adjustable FitWith a wrist circumference range of 150mm-232mm, this band accommodates a variety of wrist sizes for personalized comfort. Lightweight DesignWeighing only 13.6g, this band offers a barely-there feel for all-day comfort during activities and sleep. Easy to InstallationThe 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 Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!