A new wearable radiation shielding vest has been successfully tested on a NASA mission to the Moon, cutting astronauts' radiation exposure in half.[2303][253] According to a team from StemRad, the startup behind the vest, it performed roughly as well as the Orion's onboard shelter during the Artemis I mission.[2303][253] The vest was designed to shield astronauts from the worst effects of solar storms, which can cause cancer or radiation sickness.[253] The company aims to develop personal protective equipment against radiation, a problem that will become increasingly relevant for future Mars missions.[253] The Artemis I mission provided valuable data on the vest's performance during an actual solar storm.[2303][253]