I plan to use this product during breaks while snowshoeing or cross country skiing. While these activities generally produce an abundance of body heat, one cools off quickly when taking a break. Deep snow requires the ability to put on extra leg insulation w/o removing ski's or snowshoes. The full side zips allow that. I normally wear large but bought XL to allow for layering. These are a snu
This review was written in the old system and had content requirements that are different than reviews written today.