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

Leather is a firm, but not too 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.