Rawlings PRODCTDCB Heart of the Hide 13 inch Dual Core First Base Mitt (Left Handed Throw) 249.95 Rawlings Rawlings PRODCTDCB Heart of the Hide 13 inch Dual Core First Base Mitt (Left Handed Throw) : Recommended for adult or elite player. Heart of the Hide soft leather shell. 30% player break-in. Tennessee Tanning pro lace. Deer-tanned cowhide lining. This Heart of the Hide Dual Core 1st Base baseball glove from Rawlings features the Single Post Web, which gives it a stretchable web and forms a snug secure pocket which allows the ball to stick and not bounce. This glove also features a Double Ca-Thug style which allows you to mold the end of the glove to scoop the ball. With its 13 pattern, this glove is designed only for the 1st base position. This new Heart of the Hide leather is tanned softer for that game ready feel with the durability and consistency remaining the same. The softness of the new leather allows for less break in time. This Series of gloves now features Dual Core Technology, which is position specific break points in the glove pattern.