[leed]

I know this is old.. But quick question:

What exactly supports the bag/gives it structure? I noticed that it folds completely flat, length wise, kind of like an accordion, which brings me to question what keeps it sturdy? It seems that putting stuff inside it keeps it sturdy enough to pull it along upright. But if it were half empty, it would collapse and it'd just be like dragging a pillow case full of rocks.

I'm just curious, as I'm beginning to look into getting a new bag, as mine is too small.