These are the first out of four different brands of overshoes I've tried that have actually kept my feet warm enough. In temperatures from 30 to 35 I can wear these with my SpringWinter shoes and wools socks and my feet stay warm for two plus hours, anything below 30 my feet will start to get somewhat cold around the two hour mark but never painfully cold. These are not terribly aerodynamic but I doubt they create noticeable drag and I do love the fact that they are not neoprene. These seem like they'll be fairly durable and once dried most road spray can simply be brushed off.
