Are the shb-50 from yonex have non-marking soles? Cause normally, badminton shoes have the brown rubbery thingies at the bottom, and the shb-50 doesn't have it i think. Its all grey. Does that mean it marks the floor?
there are other rubber compounds with any color that r non marking http://www.badmintoncentral.com/reviews/showproduct.php/product/434/sort/2/cat/9/page/1