The Akadema ADJ-154 Precision Kip Series 12, 5-in baseball first base mitt is constructed with light and tight-grained leather for a pliable, easy-to-break design that maintains a high-tensile strength, This glove has a 2-piece web, an open back and a deep pocket, Webbing: 2-Piece Semi-Closed--Provides you with a durable and flexible web, Material: Kip Leather--A durable leather that allows for easy break-in, Backing: Open--Provides you with more flex and breathability in your glove, SKU: AKMA035