Lightweight, thin leather. Probably harvested from a small animal. Not as protective as thicker leathers.
The following animals provide Lightleather.
Lightleather is one the least protective and least insulative textiles in the game. It also has a fairly low beauty factor. Thus it should only be when there is no alternative or where its stats have little effect on the utility of the resulting item, such as in clothing production quests or Armchairs whose beauty rarely significantly affects a room's quality.
Lightleather is a new leather type added in 0.19/1.0. It merges the different leather types of small animals from earlier versions.