Got these for my husband who had wanted slide on/off slippers for a long time. We both couldn't believe how comfy they were. There is plush memory foam-like material that feels so nice. He's an 11 and the 11-12 fit perfectly. I also like the lightweight rubber sole - it's easy for him to go out on the deck to let the dog out without feeling like wetness will seep through the bottom. Very happy with this purchase!