What to Pack in Your Carry-On Bag
13 Things to Pack in Your Carry-On Bag
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These Hedley & Bennett The Wake Up & Fight Mask ($45 for three) are no-nonsense masks that don't take up much space. They have a slot to put in a filter, and they're washable (I've washed mine several times and it still holds up). Plus, they donate one for every mask purchased, and they're comfortable for long flights.