The soles are made of suede, so they don't make a flapping sound when you walk. The color is chosen to make dust less noticeable. Thank you! (*^^*) - Care Instructions - Since it's washable, you can use it every day with peace of mind even if it gets dirty. (※Please wash with a neutral detergent and a laundry net.) 【Size】 M: 23.5～25cm (approx. 9.25 - 9.84 inches) 【Color】 Black