Suitable Wrist Size:Surundo Nylon Sport Band for Whoop Band 4.0 One Size 130mm-220mm (5.1 - 8.6 inches), suitable for most people, no matter men, women, teenagers or elderly. You can quickly and easily adjust the wristband size to fit your wrist. Ensure the safety of your beloved Whoop 4.0 tracker. Compatible Models:The case and band integrated design is compatible with WHOOP 4.0 bands, the strap is made of high-quality nylon material, softer, durable and elastic fabric band can avoid skin irritation or allergies, flexible, lightweight, washable, quick drying, let your wrist comfortable all day Full Body Protection:The sturdy bumper has a flexible and shock-resistant structure, providing all-round multi-protection for your fitness band. The raised bezel protects the screen from surface scratches, scratches and impacts. Very strong and sturdy to protect your precious watch safe Easy to Install:Easy to install without tools, just one-click removal. Precise cutouts give you access to all controls, buttons and sensors. You can easily charge the whoop band without taking it off, firmly lock your watch without worrying about the risk of falling off Nylon Band for Whoop 4.0 Accessories:Personalize your Whoop band for men and women to match your mood and daily wearing style. It is perfect for outdoor activities such as running, swimming, cycling, fitness, partying, mountaineering, hiking, etc. You can change it according to different occasions and moods and outfits in daily life. Give your Whoop fitness tracker a new look and make it look more fashionable Colour:black Material:nylon Package Contents: 1 * strap Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.