Just to echo what others have said I will make a few suggestions.
1) Socks should be thick and warm, silk liners are good but don't try putting on several layers of cotton socks. I always carry an extra pair of socks in my day pack when out, really a life saver if your feet get wet.
2)Try shooting your bow in all of your cold weather clothes, I found out this last winter that clothes should fit pretty close to the body when shooting.
3)This may be obvious but hats, long underwear, vests and fingerless wool gloves really help and are not too expencive.
4) I have been able to find some good deals on military surplus wool clothing, quiet, dark green and cheap!
I am not a experienced hunter by any means, but I do live in the mountains, Juniper Bow