You've probably used a U-shaped travel pillow if you've ever been on a long flight or train ride. These inadequate pillows are 'designed' to support your neck and head while you sleep, helping you to avoid stiffness and pain.
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“A few weeks ago I saw a track hack on TikTok for the budget airlines that don't let you carry on a bag,” the text continues. “Instead, you can use a travel pillow as additional storage.” She explained that she got a U-shaped travel pillow that had a zipper on it.
Can You Bring a Pillow on a Plane for Free? While some airlines allow you to bring a pillow on the plane free of charge, others charge a fee for this additional luggage add-on.
Most people who have those classic, C-shaped neck pillows put the thick, closed part on the back of their neck and the thinner, open part in the front. But, according to @Sidneyraz, you're actually supposed to turn that around.