Definition
Long underwear is a type of thermal underwear consisting of long-sleeved shirts and long pants designed to provide warmth in cold weather. Think of them as a cozy second skin for winter. They are typically made of materials like cotton, wool, or synthetic fabrics, known for their insulation properties. They are worn as a base layer under clothing to trap heat and wick away moisture. Popular for outdoor activities such as skiing, snowboarding, and hiking in cold climates. They're the unsung heroes of winter comfort.