Traveling with a Dyson Supersonic hair dryer requires some caution, specifically regarding voltage. Dyson hair dryers are not "dual voltage." This means if you have a 110-120V model (standard in the US and Canada) and you try to use it in a 220-240V country (like the UK, Europe, or Australia) with just a plug adapter, you will likely fry the motor and permanently ruin the device. Even heavy-duty voltage converters often fail to handle the high wattage required by the Dyson. If you are traveling within your own voltage zone, it is perfectly safe to pack in your checked or carry-on luggage. However, for international trips to different voltage regions, Dyson generally recommends leaving the dryer at home. Many people find it safer to use the hotel's dryer or buy a cheap local one rather than risking a $400 piece of technology.