The Friendly Swede Sleeping Bag Liner - Cold Weather Microfiber or Ultralight Polyester Adult Sleep Sack in 3 Sizes- for Hotel and Camping Sheets - Travel Sleeping Bag with Pocket-Size Stuff Sack

I bought this sleeping bag liner (about $25) to use on my ZipAir flights. Works well, and folds much smaller than the blankets bought from the airline. For pillows I use an OG inflatable neck pillow https://a.co/d/fds7mYI