Fast-drying, fan-favorite HydroKnit is perfect for all water-based and high-sweat activities. It retains 30% less water than SuperKnit and with this pack, you have the option to wear it on your wrist or bicep. 

Includes Band, Hook, Clasp, and Fast Link™ slider that makes swapping bands easier than ever. Only compatible with WHOOP® 4.0.