[MERINO WOOL] Standard 100 Oeko Tex 100% Natural Australian Merino Wool (Lightweight 200g/m² , Midweight 250g/m²) Advanced insulating technology, such as hollow fiber filling, effectively blocks cold air and stores more warm air, keeping men warm in cold weather. [LAUNDRY INSTRUCTIONS] For best results, cold wash (max temp 30℃/86℉) then tumble dry on low [MERINO BENEFITS] The breathable interlock knit merino wool is perfect for maintaining thermal comfort to keep you cool when it's hot, and warm when it's cold so you can stay comfortable in any season. Winter warmth preservation men's velvet AB colorful thread suit round neck thermostatic bottoming thermal underwear set [MERINO WOOL] Standard 100 Oeko Tex 100% Natural Australian Merino Wool (Lightweight 200g/m² , Midweight 250g/m²)Pull On closure[LAUNDRY INSTRUCTIONS] For best results, cold wash (max temp 30℃/86℉) then tumble dry on low[MERINO BENEFITS] The breathable interlock knit merino wool is perfect for maintaining thermal comfort to keep you cool when it's hot, and warm when it's cold so you can stay comfortable in any season.Winter warmth preservation men's velvet AB colorful thread suit round neck thermostatic bottoming thermal underwear set