Hard case made with water squeezing technology. The vegetable tanned leather produced by Tochigi Leather, a tannery located in Tochigi Prefecture, is the best leather in Japan, using a unique manufacturing method to bring out its softness and durability. Using a technique called water squeezing, the leather was shaped into a three-dimensional shape over several days, and a steel core was then incorporated inside. The leather on the surface will change to a deeper color over time, so please enjoy the process.