The major improvement is adding Rocky Gore-Tex socks. My trail runners are not waterproof. A single pair of heavy wool (Thorlo Trekker) socks allows my toes to get uncomfortably cold once wet from snow. Of course, below 20F, I probably won't have this moisture problem from snow. I also plan to get a larger size so that I can wear two pairs of socks without constriction, and will experiment with vapor barrier socks (silnylon MYOG) below 20F to manage moisture from sweat.