WHOOP HydroKnit Bicep Band, Versatile, Comfortable, and Adjustable, 4.0 ** ATTENTION ** My liquidation items can be new or may be open box but is in excellent condition. Please review photos and ask questions if you have a concern. Brand WHOOP Material Stainless Steel Color Night Swim Compatible Devices WHOOP 4.0 Fitness and Activity Tracker Item Weight 0.07 Kilograms Sensor Type Optical UPC 810114360446 Manufacturer WHOOP