Although I seem to wear through a pair of these house slippers every 6-12 months, they're so comfortable it's worth paying the modest cost once or twice a year.

This latest pair I purchased from Amazon are comfortable, the size was correct, and the price was right.

These slippers are really designed for indoor wear, but I do step outside with them briefly every now and then. The soles are strong enough for that kind of use, but I wouldn't suggest walking in them any distance on pavement or gravel.