Similar to the insulating fur of polar bears, Thermolite® is based on hollow fiber technology that traps warm air inside the fibers. Fabrics made with these advanced fibers have enhanced insulation properties and retain features including lightness, air permeability, flexibility and comfort. Thermolite® is the ideal solution for consumers who need maximum warmth and protection in base layer apparel for extreme conditions.

One of the key challenges in dressing for cold weather activities is keeping warm while staying dry. Many traditional insulating fabrics are not breathable, trapping moisture against your skin. Trapped moisture is uncomfortable at best, and often results in you feeling colder than if you were wearing less clothing!

Thermolite® keeps you warm and dry - without bulk.