Okay, I like these slippers. Super comfortable, breathable, warm. The only thing that irritates me (and therefore only 4 stars) is the lack of half sizes in the size specification. Everyone says "perfect fit" - I agree 100%. Problem is, you're half your size. In my case I went up a size - I'm a solid 10.5 and bought an 11. I'm damn happy - they're a bit big and it would be perfect if I could go half a size down. They aren't big enough to fall off my feet and I think going to 10 would be too tight, especially when wearing thicker socks in winter.