(just an addendum, the reason I dont recommend motherboard sound is even the best ones pick up some EMI. Wish I had tried these ages ago and will absolutely order more. I tried a running shoe, but it didnt offer the support or durability that this shoe offers. I took a chance and ordered the Calinda flat and one other style, both in size 8 1/2 M. Theyre not worth $65 (including tax), but Im keeping them because theyre cute, light & comfy. Portable exercise equipment. Every time I get slippers they start to smell and I have to wash them and so I thought these would work better because it?s open, and it does! Super cute, and easy to keep clean. * battery quality - a little bit over a week of daily uses for 8hr+ a day. The bar code on the box was cut out and replaced with another?do not buy!