100% 260gram or 200gram 18.5 micron extra fine merino wool base layer pants for high loft insulation and moisture management. Full length long john for complete coverage, next to skin base layer bottoms, breathable pure merino wool fabric, lightweight and warm, best for hunting. Merino wool is silent, thermo regulating, and odor free, making the base layer leggings a must-have piece for any serious hunter looking for an edge in the backcountry or treestand. Care Instructions: This 100% pure merino wool. Do Not Bleach, 30 Very Mild, Do Not Tumble Dry, Iron Max Heat 110, Do Not Dry Clean, Wash with Similar Colors. Because it was made in the mountains rather than in a petrochemical laboratory. It's naturally renewable, recyclable.