Dyson hair dryers are not waterproof. Dyson's hair dryer is not waterproof. If it falls into a pool, be sure to drain it. Do not rush to use it at this time. Leave it in a rice bag for more than 24 hours, because the rice will suck out the moisture in the hair dryer. Sen Technology Co., Ltd. is a British international company specializing in the production and research and development of home appliances. It pioneered bladeless fan products in the world and has applied for invention and utility model patents in China and many countries.