| 21. | Air mattresses use one or more air chambers instead of springs to provide support.
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| 22. | The two slept on a decrepit air mattress that would deflate during the night.
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| 23. | It was empty of people except for one silver-haired man asleep on an air mattress.
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| 24. | Participants should bring a sleeping bag and air mattress.
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| 25. | Narrow hallways were lined with bedrolls and air mattresses.
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| 26. | Last year, a woman even paddled out in the cold water on an air mattress.
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| 27. | Actually, Long sleeps on an air mattress next to the washing machine in the basement.
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| 28. | Air mattresses were spread around the building in case students would try to jump down.
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| 29. | I got a novel, put on a sweater, and promptly fell asleep on my air mattress.
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| 30. | One man brought a folding cot, and several had foam-rubber and air mattresses or sleeping bags.
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