Mizuno Men's Heist IQ MID Baseball Shoe 100% Synthetic Imported Synthetic sole New baseball metal spike designed for quickness New anatomical last provides superior fit, minimizing power loss, and maximizing strong acceleration New IQ outsole that enables greater torsion flexiblity and resiliency while providing maximum traction and lightweight experience Full length U4ic midsole is an innovative lightweight midsole material that is well cushioned, responsive, and resilient New 3 layer no sew upper designed for lightweight, support, and breathability