Funny

Not everything expands when it gets warmer nor contracts when it gets cooler and the air in your pad isn't at ambient anyway cause yer layin on it. Sure Boyles law applies to the air, but not to the container. My Warmlight down air-mattress gets harder during the night and often I have to let some air out to soften it a bit. Since its 3 " fully inflated, it can lose some air and not suffer. I have to be careful not to over inflate it.
Jim crazy
Jim
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These are my own opinions based on wisdom earned through many wrong decisions. Your mileage may vary.