Gamma RZR Dri Replacement Grip Tennis Replacement Grips : Gamma's RZR Dri Grip gives you a thinner grip, providing more handle feel and feedback. RZR Dri is coated with Dri PU that wicks away moisture from your hand, leaving you with a dry secure grip in any playing condition. The RZR non-woven base will not shift on your racquet, giving you more control on every shot.