Fit everything for your trip into a bag that slides under the seat in front of you. 1. Lululemon City Trek Trouser II Minimize the load in your carry-on bag by bringing only one pair of pants. The moisture-­wicking, extra-stretchy fabric in these trousers is designed for extended wrinkle-­free wear. Slip them on for your evening flight, then wear them to your morning meeting the next day. $128 2.

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