The leather we use is 100% vegetable tanned (Veg-Tan Premium) with a thickness of 3.7mm. In other words, the tanning process is done without chemicals that are harmful to the environment. One of the benefits of vegetable-tanned leather is that it is more resistant, as all the layers remain intact after tanning. What's more, over time you'll notice that the product has gained personality and unique characteristics. The more you use it, the more beautiful it will become.