Our late Jan hunts here can be rather extreme so I have three pairs 800,1200 and 2000..Northern Dave was right go at least one boot size larger[in my case 2 sizes with 1200+2000 ]to make room for socks and air circulation.Two years ago Jan.we came off the field the first night and the actual air temp was -21 the 2000 gram with 2 pairs of socks did the trick...I hate cold feet!
