Double Layer knee joint insulation
These knee warmers will add two layers of insulation across knee. Protects thigh area from winds with a thermal layer of insulation against cold. The stretch fleece a high performance thermal material which is engineered after the polar bear's fur. The hollow core of filament yarns trap air to improve thermal insulating characteristics. The heat is stored in the hollow core center and released back to your body to keep you warm the same way polar bear fur works. The hollow core fabric allows you to enjoy all outdoor activities and stay warm in the cold climate. It is warm without weight feature provides a full freedom of movement which is good for garments where warmth really counts. Fabric is all way stretch poly spandex with a brushed fleece internal and smooth exterior.