Bought for adult grandson, he has had other acorn slippers before but he wears them until they are ragged.  He wears them anywhere and everywhere he wants to be comfy.  I used to be embarassed when he was in his teens because he would wear them instead of shoes and then I realized no one really cared or even noticed.  When I say he wears them everywhere I do mean everywhere except for work.  I have never had a better slipper, they are very versatile due to the comfort and the sole is made very rugged but very comfy.