The original AireatorR was such a solid, versatile platform for a sock that it had to made in wool also. That is exactly what the WooleatorR is. Performance cycling and running shoes require a sock that doesnt take up too much space. Cooler temperatures and inclement weather dont mean your shoes grow to accomm0date thicker socks. You need better insulation in the same space. This is when the WooleatorR shines. Since they are so thin, they dont take summers off. For an honest, fourseason multi sport workhorse of a sock, try the WooleatorR. Sizing: Small Women 6 8 Medium Men 7 9 Women 8.5 10.5 Large Men 9.5 11.5 Women 11 13 Extra Large Men 12.