in the form of infrared radiation, cooling down in the process. but some objects radiate so well, they become cooler than the air around it, like these frosted blades of grass, a phenomenon only observed at night and out of the sun. so sky cool designed a new material with radiative cooling properties that work 24 hours a day. it's hundreds of tiny objptical layers, but it's also highly reflective, staying cool even under direct sunlight. >> that combination of properties has never been found in nature. >> are they actually physically cool to the touch? yeah, they're much cooler than what i would expect. it's a hot day and that's cool to the touch. >> yeah. >> reporter: the panels work by chilling water running through pipes embedded behind them. and then that cold water flows into a building's cooling system, helping to cool refrigerant liquid, which eases the workload for the condenser. the less your condenser runs, the less you pay in an energy bill. this grocery store in stockton,