Very thin and teeth are extremely sharp. They are comfortable, light, and sleek, but they fall short at their primary function -- being a good pair of runners. The fur is already worn thin on both of the slippers after only 3 weeks of wear. Would highly recommend, especially for the price! Easy to assemble,Although the instructions are not the best. We thought the swelling would require us to add a half size but that was not the case. All 3 of the ones I bought from this listing developed a very loud crakeling, static sound with in a month of use. For the beige colour size 6 is too small would,ve needed a 6 1/2 maybe 7. I know good sound when I hear it, and these definitely live up to their hype. I am, however, somewhat of a headphone geek, and I gotta say I was pleasantly surprised by the the ones it came with.