Sport Flex Wrist Band Sweatproof Replacement Band Compatible for WHOOP 4.0 Sport Band Light Gray & The FITSPUR SportFlex Accessory Wristband 4.0 is a breakthrough band made from waterproof, sweatproof, and dirtproof silicone. It's highly and designed to withstand the most intense workouts and sports. Not only is the SportFlex Accessory Wristband's silicone material exceptionally , it's also ultra-smooth, hygienic, and easy to clean. Small can be wiped off, or you can deep-clean the band with and a lint-free cloth followed by a water rinse. Colour:Light Gray & Black Material:Silicone note:Watch not included Due to different batches, there may be differences in product appearance and printed text, which not affect use Package Contents: 1 * Wrist Band 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.