From the manufacturer

TPU SADDLE SYSTEM

A strong, lightweight saddle located on the medial side of the shoe locks your foot in place, providing maximum stability throughout your swing.

LIGHTWEIGHT AND SOFT EVA FOAM

Responsive EVA foam provides lightweight cushioned feel throughout the midsole for superior step-in comfort.

SPIKELESS OUTSOLE

Carbon rubber outsole prevents slipping, providing the ultimate grip, no matter the surface. Traction lugs in a radial pattern provide 360 degrees of grip.