I been wearing them in the summer for alot of years. I got a pretty hot wife wearing them but they never made her panties fall off. First ive heard about that. I reckon the back and knee problems most folks have has more to do with that big ole belly theyre toting around than the shoes theyre wearing. Seems to me the more my belly grows the more my back hurts, the taller trees get too. I would think theyre about the closest thing to walking barefooted, which is what humans were made to do