Leathers

Full-grain leather

Also called Full grain

Leather with its original grain surface intact.

The Leather Research Laboratory (University of Cincinnati) gives the ISO, ICT and IULTCS definition: leather bearing the original grain surface as exposed by removing the epidermis, with none of the surface removed by buffing, snuffing or splitting. Leather Naturally says full grain is made from the top layer of the hide or skin.

Definition
Original grain surface, nothing buffed or split away (ISO)
Layer
Top layer (grain split)