TUO Kinetic Merino 250 Bottom Deadfall 3X-Large Warm 250g interlock fabric;95% 18.5-micron merino wool, 5% spandex;Naturally moisture-wicking and antimicrobial;Merino wool spun around a nylon core for added durability and stretch;Maintains thermal regulation and breathability;Flatlock seams for next-to-skin comfort;Covered elastic waistband for a secure, comfortable fit;Functional fly for convenience;Ideal for cold-weather base layeringtable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; } Item Category Code: 5500 Product Group Code: 5500B Product Sub Group 1: 5500B1 Product Sub Group 2: 5500B1D Inactive: Yes