Air Pads losing pressure on a cold night. Is it possible?

[OlTrailDog]

My goodness, is this forum starting to slip into the abyss, or what??? Where is Jellyfish, Kitsap, or Doc patiently explaining the formula for the partial pressure of a gas at a certain temperature is simply a function of ---> insert formula with example calculation here.

[cmoulder]

My goodness, is this forum starting to slip into the abyss, or what??? Where is Jellyfish, Kitsap, or Doc patiently explaining the formula for the partial pressure of a gas at a certain temperature is simply a function of ---> insert formula with example calculation here.

Warm air shrinks?

[OneClick]

What I always do is to inflate my pad when I get to camp and then a couple of hours later then I'm ready to go to bed I top it off. After doing that I never had a problem with "losing" air in the middle of the night.

Yup. Just like if you ever used a pack raft. You can blow it up until it feels like it's going to pop. After you get into to cool water, it feels like you're going to sink it! So you "temper" it by adding more air to occupy that colder space while sitting in the water. Then, don't leave it in the sun out of water or it may actually pop.