Material: PLA There are magnets inside the shell and on the bottom of the hermit crab to help keep it comfortable in its shell. The magnet holds him tightly to keep him inside, like all his kind, he refuses to come out of his shell. Hermes may be a hermit in the name, but being a recluse never got in the way of being a good friend. Don’t take his quietness the wrong way, he really enjoys your company.