All animal hides go through the tanning process. Sheep leather tanning isn't an exception. Two types of tanning methods are common: chemical-based and vegetable oil-based. Chemical tanning is a fast and cheaper way. However, it comes with serious consequences for the environment. On the other hand, vegetable tanning is a time-consuming and expensive way of tanning leather. However, Classy Leather Bags uses this method for tanning as the process is environmentally friendly.