More alarming was that I ruined my BK beauty contoured foundation brush. It looks amazing. I did re-order an 11 (41) so when I receive that, Ill update this review. Its GREAT! Used it outside the front door entrance so that dirt from footwear stays outside the house. Now the sound is clear but it is not bass heavy so if you are looking for something with deep bass, this is not it. It was pretty just not comfortable. Facebook group Sachimart Club They have a light up feature which is turned on or off on the button on the inside of the shoe. They are extremely small, although they state a uk size 7.