I bought this for moderately cold days and I've only worn them down to 38 degrees so far. I have to say that they are warmer than I thought they would be. I worn them with only one pair of wool socks and my toes have stayed warm over long rides. The covers look a lot better in person than they do in the picture. They are not buly like the Gore covers that I have. I look forward to seeing how they perform below 38 degree. This is worth buying.