The lining is very soft, and the soles are rippled to prevent slipping (we have wood floors and she does not slip when wearing them). Its adjustable but havent felt the need to: works well for both my 53" height and other users in my household (ranging up to 510"). The bass rolls off a bit but what is there is ample and good tight quality. This is a piece of rubber that sits in mesh canopy on the outside. I would have given this 3 stars instead of 2, however the earrings arrived with some problems. The cord already broke. Again, no interference and no dropouts. Dont try to jam it in. I purchased 12 box one and it comes with lid for each box and stackable what ever way we like. Most importantly to me is that theres no dumb, giant logo on the sides?theres just a number.