Thermals are a type of workwear designed to provide extra warmth and comfort in cold environments. They are typically made from lightweight, moisture-wicking materials that help regulate body temperature by trapping heat close to the skin. Thermals are often used as a base layer under other workwear, such as jackets or coveralls, and can be worn in a variety of work settings, including construction, forestry, agriculture, and outdoor recreation. They are available in a range of styles, including long-sleeved tops, leggings, and one-piece suits, and can be made from natural materials like wool or synthetic materials like polyester. 

Investing in quality thermals can help workers stay comfortable and productive in cold weather, as well as protect them from the health risks associated with exposure to extreme cold, such as hypothermia and frostbite.