You are seated on your Scuba-Doo, with your head and shoulders in a clear dome. Your air is constantly being replenished from a scuba tank, enabling you to breathe normally!
Manouverable? You bet! At a rate of 2.5 knots you're able to ride amongst the spectacular underwater world, or remain stationary while you feed the fish. What's more, on the Scuba-Doo scuba bike you can wear your spectacles or contact lenses with no problems!
Link via Neatorama.