Thick Clefthoof Leather
Thick Clefthoof Leather can only be obtained by skinning the species Clefthoof that inhabits Nagrand in the Outlands. The creatures that produces Thick Clefthoof Leather are Aged Clefthoof, Clefthoof Bull, Clefthoof and Clefthoof Calf. The best place to farm Thick Clefthoof Leather would be around Garadar, the Horde’s Camp. The creature to farm for are the Clefthoof Bulls.
See below for the map to farm Thick Clefthoof Leather in WoW.