Hard case made by wetforming technique. The vegetable tanning leather of Tochigi Leather, a tanner in Tochigi Prefecture, is the best leather in Japan, bringing out softness and durability through its unique manufacturing method. The leather was made into a three-dimensional shape by a technique called wetforming, and a steel core material was incorporated into the leather. The leather on the surface changes with aging into a deep color taste, so please enjoy the process.