Hyperice Normatec Arm Recovery Sleeves use pulsing pneumatic compression to flush metabolic waste from arm muscles and accelerate recovery between training sessions. Zone boost technology allows users to focus additional compression on specific trouble areas such as the forearms or biceps. Compatible with the Normatec control unit, they integrate seamlessly into existing Normatec recovery systems. A proven tool for climbers, tennis players, and any athlete demanding fast upper-extremity recovery.