What to wear in Business Class. The general rule of thumb when it comes to the business class dress code for most is smart casual, so you can still get away with your comfy flying pants however thongs (flip-flops), beachwear or clothing with offensive images or slogans are not permitted.

For an international business class flight in 2026, the ideal attire is "Elevated Comfort"—a look that is sophisticated enough for the lounge but comfortable enough for a 12-hour journey. Many frequent flyers opt for high-end "athleisure" or technical fabrics that don't wrinkle, such as Lululemon’s Commission pants or a merino wool sweater. For men, a pair of dark, tailored chinos and a polo shirt or a high-quality T-shirt paired with a light blazer is a standard choice. For women, a "travel set" of cashmere or silk-blend joggers with a matching wrap is popular. You should avoid tight jeans or restrictive belts, as your body naturally expands slightly at high altitudes. Because you will likely be using the "lie-flat" bed feature, many passengers bring a change of comfortable pajamas (though some airlines like Qatar or Emirates provide them). Footwear should be "slip-on" (like loafers or clean white sneakers) to make the security process and in-cabin movement easier. The goal is to look like a professional traveler while ensuring you can actually sleep during the long-haul crossing.