German retailer Afew continues its 2015 “Koi” color story with the release of a special one-off sneaker with ASICS.

This GEL-Lyte III, dubbed “Black Koi,” finds the retro runner outfitted with a black toebox, contrasted by a perforated leather and grey suede paneling at the midfoot.

The sneaker hits the auction block here, on May 23, with all proceeds going to benefit the Kinderhospiz “Regenbogenland Düsseldorf” — a Düsseldorf-based children’s hospital.