Style#: FZ8655-601 Synthetic leather on the upper with molded details adds durability. Thick heel piece provides stability. Be quick between the bases and nimble on defense in the Nike Hyperdiamond 4 Keystone. A rubber outsole with studs gives you traction to help beat the relay throw from the outfield. Padded tongue and collar Be quick between the bases and nimble on defense in the Nike Hyperdiamond 4 Keystone. A rubber outsole with studs gives you traction to help beat the relay throw from the outfield.