Yes, you are permitted to bring a hair straightener or flat iron on a Norwegian Cruise Line (NCL) ship in 2026. According to NCL's official prohibited items list, personal grooming devices such as hair dryers, curling irons, and flat irons are allowed on board, provided they are used with proper caution and are in good working condition. Unlike clothes irons or steamers—which are strictly banned due to being fire hazards—hair styling tools are considered safe as long as they are unplugged when not in use. However, it is a peer-to-peer best practice to ensure your device has an "auto-shutoff" feature for extra safety. Be aware that ship security may inspect any electrical device at embarkation; if your straightener shows signs of frayed wires or damage, they may confiscate it for the duration of the cruise and return it to you on the final day. Most NCL cabins also provide a built-in hairdryer, so you only need to pack your straightener to achieve your specific look.