2 strong magnets sewn into a leather-like pouch on 1 side of the coolie. Neodymium magnets keep your drink secure to metal surfaces, even when the can is full. 1/8" (thickness) neoprene material, magnets are encased in leather-like material and sewn to one side. Collapsible bottom, folds flat for storage. Graphic is a durable heat transfer, 1 side print. Helps prevent surface damage by limiting condensation.