Thermore® is a high-tech thermal insulation designed to offer soft, lightweight warmth, maximum comfort and long-term durability. Thermore® has a very low density structure - its volume is made up mostly of trapped air, a highly efficient insulator. Thanks to patented Special Reduction technology, Thermore® offers high warmth in a reduced thickness. Lab tests demonstrate Thermore's SR technology allows for a 50% thickness reduction while only reducing the thermal value by ten percent. This allows garments to be made in a slim profile while still maintaining an effective warmth level.