"It's like packing your clothes in your suitcase when you travel," a spokesperson for IMRE said.

“这就像你旅行时往手提箱放衣物，”新加坡材料工程研究所发言人说。

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“It’s like packing your clothes in your suitcase when you travel,” a spokesperson for IMRE said.

“这就像你旅行时往手提箱放衣物，”新加坡材料工程研究所发言人说。

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Conversely, don’t use a suitcase that is too large for its contents, as this can cause clothing to move every which way during travel and become wrinkled.

反之，也不要携带能装下你的所有东西还绰绰有余的太大的行李箱，因为这会使衣服在旅行过程中到处移动，产生褶皱。

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How freeing it was, these days, to travel alone, with only a single suitcase to check.

NPR: Excerpt: 'Unaccustomed Earth'

Really, though, the biggest suitcase essential is common sense, "which most people forget to pack when they travel, " she says.

CNN: Breathe easy: Frequent flyer health tips