The keychain is handcrafted from specially selected full-grain leather that has been treated with a semi-vegetable tanning process. This leather has a beautiful oil and wax finish that makes the leather durable and provides long-lasting durability. As the fob ages, the skin softens, develops a nice earthy tone and acquires a lovely rusty finish. The inner lining is a thermally bonded layer with a velvety soft surface. The tanneries that produce this amazing full-grain leather are based in Europe and the Middle East.