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After teaming up with Brooks on the running company's first-ever sneaker collaboration, Concepts is right back with another special project. Taking to its Instagram, the New England retailer shared a photo of red insoles branded with Concepts on the left shoe and the number 35 over a star graphic on the right.

Concepts has not yet revealed the sneaker or the theme of the collaboration, but based on the insoles, it could possibly be a commemorative Reebok Pump to honor the late Boston Celtics All-Star Reggie Lewis. Lewis wore 35 and even rocked Reebok Pumps as a member of the Celtics. He was on the East squad in the 1992 NBA All-Star game and the star graphic on the insole is actually identical to the gradient-filled star used on the '92 All-Star jerseys. Lewis passed away at age 27 due to a heart condition.

Concepts' collaboration is set to release this Saturday, September 20.

[via Concepts]