I wear Sidi 43 Mega Genius (wide) summer road shoes and regular size 9m street shoes. My initial purchase for the Sidi Hydro was 44 to make room for extra sock thickness but I am questioning this. The shoe is very roomy with a standard sock. A thick sock still gives me movement both in the heal and the palm of the foot and the straps are pulled a little past the mid point of the straps, the ends over hang the velcro. If I wear two pair of the thickest socks I own the fit seems about right in the palm area but I still have some movement in the heal and a lot of room, .75 inch, in the toe.
My questions are: Will I really need two pair of very thick socks to keep my feet warm in say the mid 20's? Can I expect one pair of medium weight wool socks with these shoes to keep my feet warm in mid 20 degree weather? Can any other people using this shoe make suggestions regarding the above mentioned fit scenerio?