Blankets. Business and first-class flights offer comfort items like blankets during the flight. You must leave them on board when you're leaving the plane as they can be reused.

No, you are not allowed to take the blankets from United First Class or United Polaris Business Class. These blankets, which are often part of the high-end Saks Fifth Avenue bedding collection, are considered airline property. Like the pillows, duvet covers, and noise-canceling headphones, they are collected by the flight attendants before landing to be professionally laundered and reused for future flights. Taking them is technically considered theft and can lead to the airline charging the credit card on file for your booking—Saks Fifth Avenue blankets are often valued at over $50 by the airline. If you truly love the quality of the bedding, United often sells these items on their official "United Boutique" website or through the MileagePlus exclusives store. The only items you are generally encouraged to take from the premium cabin are the amenity kits (containing eye masks, socks, and skincare products) and the disposable slippers provided on long-haul routes.