I've used this for the past few years and swear by it! Before this, I always found traditional neck pillows uncomfortable and would end up ditching them halfway through the flight and getting frustrated. The Trtl pillow is adjustable — you wrap the pillow around your neck and secure it with Velcro, and if you find it's too loose, just make it a bit tighter! I've truly never slept better on a plane than with this pillow.

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Promising review: "Great neck support, packs small. Lives up to the hype! I purchased this pillow for a trip I was taking to Australia with my kids. Since I was going to be carrying most of the stuff needed for the plane, I didn't want to lug a bulky neck pillow (plus they always hurt my neck anyway), and I thought I'd give this a try. I'm a total convert. It offers a lot of substantial neck support, and is especially useful for when you are stuck in the dreaded middle seat and don't want to have to worry about leaning sideways and invading your neighbors space as you fall asleep. It takes up minimal space and is comfortable and easily adjustable." —Mom2Boys

Get it from Amazon for $29.99 (available in four colors).