Calf Leather with a White/Dark Gray two tone print very similar to Stingray hide. Also called Safari Print, because something similar was used for the Nike Air Max Atmos Safari.

NOTE:  This looks extremely similar to the White/Black version, until you hold the pieces next to eachother and can see the difference in spot color.  

Leather is a firm, but not to stiff temper and thickness is about 3/4oz or 1.4mm

If you see any chalky residue on the debossed areas, wipe down with a slightly damp lint free cloth and it goes away.