currently, online and only certain shops. I never found them in a store, got my online. I cant really answer the barefoot question since i hate walking barefoot. But i dont have real straight toes and the shoes help cause it straightens the toes out and walking is not as painful. For sweating, depends on sizing and i guess the foot. i have sweated more in the snugger pair than the larger ones, but cant wear toe socks with the snugger pair, too tight. I have sweated just the same with normal shoes and no socks. Overall, id suspect it is just an individual thing.