Adventure Medical Kits AMK NanoHeat Blanket Spill proof with the DWR coating sheds spills, water, sand or dirt right off the blanket to remain clean. Keep warm with its 80% heat reflective coating on the inside allows you to wrap up in the blanket and stay warm. Lightweight and compact, this 6.8oz blanket has the ability to fit in the palm of your hand or in your purse makes it capable to be with you at all times.