general term for the ability of leather to stretch in one direction as opposed to another, influenced by the position the leather occupied on the body of the animal and the way it was used
Leather grain is an important consideration in clicking, affecting whether and how leather pieces stretch during making and wear. As examples, clickers may cut vamps to stretch more easily top to bottom, aiding lasting around sharp toes and the joints, while cutting quarters to resist stretching under tension as the wearer tightens laces.