Aquapac Waterproof, Submersible Polyurethane Key Case for Car Keys, Car Immobilizers & Asthma Inhalers, Depth to 150ft / 50m. Ideal for protecting car immobilizers, keys and keeping asthma inhalers safe in all weather conditions Guaranteed submersible to 150ft/50m and keeps dust and sand out Floats safely if dropped in water Supplied with a neckcord New Polyurethane material now suitable for extreme cold climates down to -40 degrees Fahrenheit