Black dyed high-quality leather using the Japanese traditional craft "Suzuka sumi". The rich and deep jet black was born from "Suzuka sumi", which has been made by craftsmen of "Shinseido" in Mie prefecture since the Edo period. When natural ink made from pine fat and rapeseed oil, craftsmanship leather tanning technology, and ASICS sports technology and design are combined, a crystal of high-quality tradition and culture is born.

The Wet blue was created by a method that makes use of the texture and expresses a unique tone. It is characterised by a smooth feel and excellent durability, it also has a sustainable side by suppressing the use of chemicals without using dyes.

Adopted domestic leather carefully tanned in Himeji City, Hyogo Prefecture, where the leather tanning industry has taken root for a long time. It is familiar to the feet from the beginning of use, and the more it is used, the deeper and more interesting the colour becomes.