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Message: <blockquote data-quote="Greenfield" data-source="post: 6222502" data-attributes="member: 6669384">N'raac, how does the 10 minute supply of air in the bag refresh itself?  Does fresh air enter when the bag is opened, as you suggested in an earlier post?  If so, why wouldn't water enter exactly the same way?As for the weight of air:  Wasn't asking whether air gets more dense with temperature or humidity.  Just wondering why you're arguing about it.  (Of course, I've been wondering why you're arguing about any of this, but that point is of particular lack-of-interest.)But since you can't let it go, air at sea level weighs about 0.08 lbs per cubic foot.  A person goes through about one cubic foot of air every four minutes, so two and a half cubic feet will last ten minutes.  So the answer is that the ten minute air supply the bag holds is about ten gold pieces in weight (GP being 1/50th, or 0.02 pounds.)And, again, if you've calculated the weight in your Bag of Holding that precisely, and cut it so close that the weight of the air is the difference between being overloaded or not, you have way too much time on your hands. <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":)" title="Smile    :)"  data-smilie="1"data-shortname=":)" />Umbran,  I agree that a normal bag can be loaded with all the weight you like without harm, until you try to lift it.  In the water or out, that would be the rule.But the bag, being larger on the inside than outside, doesn't displace water in the normal fashion.  Neither does it carry weight in the normal fashion.  So, just as air inside doesn't count for buoyancy in the water, neither will the weight/mass inside be affected/supported by the water outside, at least not in any differential manner.  (Buoyancy is the same, empty, full, or overloaded.)  A normal bag, when overloaded, will tear when it has to actually support the weight.  But a Bag of Holding is always supporting what's inside.  The strain certainly isn't going to the straps, cords or handles.  But if the meta-physicsy answer doesn't work, consider another aspect:  The rules as written say it bursts if you load too much weight in it.Vegepygmy, there is no explicit rule on how much a Gelatinous Cube weighs.  Does that mean that it's weightless?  Air and goods pass in and out of the magic bag without resistance. (There's no Strength check needed to access the bag.)  So why would there be a special exception for water?</blockquote>

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