These are the closest slippers to feeling barefooted that I've ever worn. (So comfortable!).  Yet, they feel warm and cozy, although they may not weight but an ounce. I gave them 4 stars instead of five because of the sizing.  My normal size is 8 1/2.  But the smaller size from what I ordered is 7-8.  Therefore, I figured they'd be too tight & went for the next size. (9-10).  But these are too large. I think size 7-8 would've worked perfectly. However, I didn't feel like the hassle of returning & re-ordering.  These are fine when I wear thick socks. But I I'm thinking of ordering another pair in the smaller size because I like them so much.