The XKG Foundation 150 Merino Bottom is the perfect next to skin base layer bottom for when temperatures begin to drop. 17.5 Microns and 150 Gram knit makes these bottoms extremely lightweight, but the small, tightly sewn fibers of merino wool keep you warm in colder conditions. With a high heat to weight ratio, you can rely on comfortably hiking without the fear of over-sweating. Elastic waistband, flatlock stitching, and rib ankle cuffs create a streamlined look and no-itch feel. And, the natural fiber qualities of merino prevent odor growth after long days in the field. The Merino bottom comes in Olive and is the foundation layer bottom for your XKG system. 100% Merino Wool Moisture Wicking Quick Dry Flatlock Stitched Seams Natural Odor Control Ultra Breathable No Itch Comfort Excellent Warmth to Weight Ratio Elastic Waistband Pant weight: 6.2 oz.