Sea to Summit Aeros Ultralight Traveller Inflatable Neck Pillow
This pillow packs down to almost nothing (2 x 2.75 inches) and weighs just 2.4 ounces! It blows up on only 3 breaths, and has a good design as far as being slim in the back and it snaps together in the front. Unfortunately, it doesn't last as long as it should for the price, but I still love it! (and the Eagle Creek pillow ) It's a single piece with glued seams.
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