Bare 5mm Ultrawarm Boots5mm Ultrawarm Boots Ultrawarmth Boots feature Ultrawarmth OMNIRED Infrared Thermal Technology embedded in the inner fabric. OMNIRED is scientifically proven and FDA determined to conserve body heat and accelerate thermal recovery. These easy entry boots restrict water flow, protect feet from sharp objects and prevent fin blistering. Its heavy duty sole has been tested in the wettest conditions to ensure support while walking on wet surfaces like boat