The shield belt would go on the belt slot, and when activated it would have a small shield around the user that stops lasers / bullets.
Either a fixed battery or inserted batteries would be used to power it, with fixed batteries probably having different shield belts with different energy storages, or just inserted batteries that would decrease as bullets / lasers hit them over time and would have to be recharged.
(I totally didn't just rip this from rimworld or something haha..) WOULD MAKE NON-SHIP PVP A LOT BETTER AND IT'D BE REALLY NICE FOR EXPEDS.