Just a quick note, which I'm sure you've already found out, Heesha. Half zip bags and hammocks are not compatible in any way, shape or form. I have one that I'm waiting very patiently to replace when I can afford it.
"If you play a Nicleback song backwards, you'll hear messages from the devil. Even worse, if you play it forward, you'll hear Nickleback." - Dave Grohl