Patent Pending : Designed by champkey and has applied for patents in the us, ca, jp and uk. All Weather Performance: The proprietary rubber material provides excellent traction and control in all condition . Tapered Profile : Traditional tapered profile encourages lighter grip pressure, promoting less tension in the hands and creating more fluidity and power throughout the swing. Proprietary Rubber Material : Exclusive high-feedback rubber material used to providing precise ball feedback and comfortable feel all time. Advanced Texture : The New " Y " shape of texture provides extra traction and hand feeling .