wool is great and warm. just remember when it gets wet it gets heavy. for riding you can't go wrong, but if you plan on getting off and chasing game on foot for any distance you might want something synthetic. the best luck with wool i've had is with cabela's wind shear. it is practically wind proof and very warm and light. if it's really cold and wet i'd rather have bibs. if things heat up or your activity level goes up you can strip to just the bibs and vest. don't bother with just a wool jacket, get the parka. for the best combo wear a wind shear sweater under the parka with the bibs and or a vest. if it goes below -15 you better think about other options.
