Wear Multiple Layers of Clothing
There are two reasons why you should wear multiple layers of clothing while traveling by plane. First, it gets pretty cold up there. People leave their overhead ACs on, and it can get pretty chilly in no time. This is especially true when the plane reaches its highest altitude, but you can always take articles of clothing off.
The second reason is that you can stuff more clothing and souvenirs in your suitcase. Since your clothing, which takes up the majority of your suitcase space, is wrapped all over your body, your suitcase will be lighter. You’ll receive stares from strangers, but who cares what they think? As long as you don’t have to pay overweight baggage fines, right?