> Pockets are usually included in the volume specs
But if you want to quote volume per the ASTM Standard then you can only include pockets which can be properly and fully closed. Open mesh pockets can NOT be counted.
Several American pack manufacturers seem to include all open mesh pockets, each one measured separately, to get a value which is simply not comparable to measurements made to the Standard. Caveat emptor.
Before anyone gets upset about this, let me add that I do not mind if the manufacturer quotes the volumes in detail - giving each one separately, so the buyer can make up his own mind. More information is good.