The expedition weight bottom is a must have for our early and late season hunters. These versatile, incredibly warm bottoms can be worn under your hunting pants or in your sleeping bag for maximum protection from the cold. "Expedition weight" signifies wool that is 400 g/m2 which makes it significantly warmer than the mid weight bottom, and while heavier this weight of wool is highly recommended for any cold weather hunting. Important considerations for choosing these bottoms are expected temperature, activity level (are you going to be glassing or hiking primarily?) and the other insulation layers you plan on packing.
Merino wool performs significantly better than synthetics across a variety of outdoor conditions. Merino is more thermally efficient across a wider temperature range, odor resistant, and easy to maintain. These benefits, especially the thermal efficiency, are especially apparent in colder weather. Experience the benefits of merino wool, you will never go back.
-100% 18.5 Micron Merino Wool