Protective: waterproof ID holder constructed of hard crush proof ABS plastic with rubber O-rings to keep out water and dust, air tight, waterproof and dust proof. Multiple uses: waterproof ID card badge holder case nice for swimming, rafting, canoe, paddle board, paddle sports, kayaking, snorkeling, scuba diving, boating, river SUP, surfing, beach, or any other outdoors activity you can dream up, even works underwater.