Combining 100 years of glove making experience with the latest bio-mechanical science, Mizuno has developed the world's best ball glove: Mizuno Pro with 4D Technology. Historically, ball gloves were created to "fit" the hand with little or no attention to the "dynamic" of the hand. Utilizing state of the art technology, Mizuno researched the dynamics of catching using data from the best players in the world. As a result, we have created position specific ball gloves that are designed with the position in mind. Specifications 12.5" Firstbase Pattern Cork Color 4D Technology™ Revolutionary Glove Construction Historically, ball gloves were created using static, paper-based patterns made to "fit" the hand with little to no attention given to the "dynamic" of the hand. Utilizing state of the art technology, Mizuno has researched the dynamics of catching using data from the best players in the world. As a result, we have created position specific ball gloves that are designed with the requirements of the position in mind. The Science of 4D Technology Position specific reinforcements allow greater grip strength and transfer of energy from your hand to the ball. The pressure points were determined by position utilizing data from the best players in the world. These pressure points, coupled with the ultimate in feel and softness of Japanese tanned Deguchi leather, creates the best feeling and most functional glove possible.