Leather

Leather is an item added to the game at the 1.0.4 update. It is obtained by using 5 Rotten Chunks on a workbench. Leather can be used to make Archaeologist's Jacket and Archaeologist's Pants. Both of these require 15 leather each to craft and a workbench. These items of armour are probably made to be sued in the social armour slots because rather than having a defence stat, it says it is a "Vanity Item".