4.0 WHOOP SportFlex Wrist Band Soft-Touch Silicone Waterproof And Sweatproof Adjustable Strap , 4.0 Compatible Whoop Bicep Band Grays Aftershock Ultrabow - Pink - Hockey Express The wristband's ergonomic design and breathable fabric provide unmatched comfort, while its advanced sweat-wicking properties keep your skin fresh during even the most intense workouts. Buy WHOOP HydroKnit Wristband - Quick-Drying Sweat-Wicking & WHOOP 4.0 Compatible | International Shipping Available | Buy Now with Express International Delivery The Hydroknit replacement wristband for Whoop 4.0, engineered for top-tier performance. Seamless Compatibility with Whoop 4.0 Sensor: Engineered specifically for Whoop 4.0, our wristband offers flawless integration, ensuring your sensor functions optimally without interference. Quick-Drying: Our wristband is designed with advanced quick-drying materials that effectively wick away moisture, ensuring you stay dry and comfortable throughout your workout. Waterproof: Crafted to be fully waterproof, this wristband safeguards your Whoop 4.0 sensor from water damage, making it perfect for swimming, showering, or any other wet activities. Aazon.co: WHOOP HydroKnit - uñequera de secado rápido y absorbe el...