These slippers are wonderful! I have Raynaud's syndrome and struggle with very cold feet that make me feel cold all over. I tried the battery-operated heated slippers and liked them, but they made my feet sweat and then the dampness made them cold all over again. Further, they weren't as durable as I had hoped, especially considering the price. So . . . I went looking for another option and found these. These slippers are very warm, but they are breathable enough so my feet don't sweat. I typically wear them with socks so I can keep my feet even warmer and my legs warm too, but I have slipped them on with bare feet, and they are warm and comfortable that way also. These slippers do tend to make my sock bunch up a bit; however, I can deal with taking off the slippers and adjusting/pulling up my socks from time to time in exchange for the benefit of consistently warm feet. :-) I like that these slippers are snug enough to stay put, but they truly feel like slippers, not shoes. There is no arch support; I like that they feel like walking barefoot, but with warmth and cushioning. The sole provides enough protection to wear them anywhere around the house and even out onto the porch, but it's not too much so the slipper maintains maximum comfort and flexibility. It took a couple days for the slippers to stretch a bit and conform to my feet, but now that they're broken in, I love the look, the fit, and most of all, the warmth.