Mizuno Pro Limited Edition GMP100BK 12" Baseball Pitcher/Infield Glove 12.00" Pitcher Glove Tartan 4 Web Speed Drive Technology - The gloves have a perfectly balanced position to provide the fastest reaction and best response possible. Deguchi Kip Leather - Tighter fibers and proprietary tanning provides perfectly conditioned leather that is stronger than previous Mizuno Pros. Shika Palm liner - Elite deerskin palm liner that provides the ultimate soft feel.