Optimal Comfort and Performance: Experience the ultimate in comfort and functionality with our HydroKnit Wrist Band, designed for Whoop 4.0. This replacement strap features a unique U-shaped design that ensures a secure fit while maintaining full sensor functionality. Advanced Material: Made from high-quality HydroKnit fabric, this wrist band offers fast-drying and sweat-wicking properties, keeping you dry and comfortable during workouts and daily activities. Easy Maintenance: The material is easy to clean and retains its shape and performance over time, making it suitable for everyday use. Note: Due to different production batches, slight variations in the product may occur, which do not affect performance. Color: Blue Material: HydroKnit Package Contents: 1 x Waterproof and quick-drying Wrist Band The package includes only the items listed above; other products are not included. Note: Lighting and display settings may cause slight color differences between the image and the actual item. Measurement may vary by up to +/- 1-3 cm.