A cotton or cotton-polyester blended fabric underwear set designed for cold weather provides warmth and comfort during chilly conditions. Typically comprising a long-sleeve shirt and long underpants, this underwear set offers insulation and moisture-wicking properties to keep the wearer warm and dry. The cotton or cotton-polyester blend fabric ensures softness, breathability, and durability, making it suitable for extended wear in various cold weather activities, such as outdoor work, sports, or leisure.