Mizuno Pro Limited Edition Series: GMP600BK Off-season conditioning program - have Mizuno get your glove into condition with the Off-Season Conditioning Program; Mizuno offers a one time repair and recondition of your glove to bring it back to its original glory Speed Drive Technology - gloves perfectly balanced by position to provide the fastest reaction/best response possible Deguchi Kip Leather - tighter fibers, proprietary tanning provide perfectly conditioned leather that is stronger than the previous Mizuno Pros Shika Palm liner - Elite deerskin palm liner that provides the ultimate in soft feel T2 web