Yes, you are generally allowed to take airplane pyjamas home if you are flying in a premium cabin (First or Business Class) where they are provided. Airlines like Qatar Airways, Emirates, Virgin Atlantic, and United (Polaris) provide these as a "gift" for the flight. Unlike the pillows, blankets, and headphones—which are intended to be reused and stay on the plane—the pyjamas are a single-use amenity for that specific passenger. Many travelers keep them as high-quality souvenirs for home use. In 2026, some airlines are even partnering with luxury designers (like White Company for BA or Sleeper for others) to create sets that are stylish enough for loungewear. However, always check if the item is a "rental": for example, Japan Airlines (JAL) and ANA occasionally provide "cardigans" or "relax wear" in Business Class that they ask to be returned at the end of the flight. If the set is presented in a sealed bag or box for you, it is yours to keep.