3 strong magnets sewn into a pouch on 1 side of the coolie. Keep your drink secure to metal surfaces, even when the can is full. Made of 1/8" (thickness) neoprene (wet suit) material. Built to fit slim/skinny size 12 oz. cans. Collapsible bottom, folds flat for storage. Helps prevent surface damage by limiting condensation. Keeps drinks colder longer and hands dry. Graphics are a durable high quality transfer, 1 side print.