Mizuno Prospect Series uses full grain pigskin leather, providing great durability and enhanced softness. Pioneered and perfected by Mizuno, PowerClose Technology makes catching significantly easier to help your Prospect learn to love the game. It's not a perfect first glove unless you see the PowerClose stamp. Full Grain Pigskin Leather: For great durability. ButterSoft Palm Liner: PU palm lining for increased durability, feel, and comfort. MZO Lining: Disperses perspiration away from the skin.