I use a polypro base layer,then i have one of two vest that i wear,one or the other, with two pockets in the front on each side and one pocket on each side in the back for chem packs,these pockets are on the inside of the vest,depending on how cold it gets,then a top layer of wind/rain or fleece top,how this works is the chem packs keep your mid section warm and inso doing keep your feet and fingers warmer. This worked great for me last winter so im set for this winter/also use pogies on the bars.