The XKG Foundation 260 Zip Off Merino Bottom is a versatile midweight base layer that is easy to take off and put on - never slowing you down and keeping in the game. 19.5 Microns and 260 Gram knit makes these bottoms 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. We added a full-length zipper on each leg for easy removal when out in the field. Each leg is only three quarter length to stop just short at the top of your boot for easier removal. Never take your boots off again when the temps begin to rise. Simply pull down your outer layer, zip off merinos, pull pants back up, and keep hunting. Elastic waistband and flatlock stitching 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. 90% Merino Wool 10% Nylon Moisture Wicking Quick Dry Flatlock Stitched Seams Natural Odor Control Ultra Breathable No Itch Comfort Excellent Warmth to Weight Ratio Elastic Waistband 3/4 Length Only weighs 7 oz.