Ontisuka Tiger has once again collaborated with Koi Klub, headed by Yoske Nishiumi. In this 4th collaboration the ‘purposefully’ meaning of the word Koi was the main point of inspiration. Koi Klub chose to work on the X Caliber running sneaker and added some rather unususla material mixes to the sneaker. Washed denim uppers are mixed with premium leather and shiny two-tone laces. The two colorways of the sneaker are releasing this week around the globe in limited quantities.