I'm guessing Iron Heart... Ah, just saw the '21oz denim' comment. You won that one... I keep thinking two things: 1. that shit's gonna stretch, and 2. I don't see any grommets, stops or tie-downs holding that on for windy days, 'specially when it stretches. Did you guys secure/lash that on top? Or is that a fastener I see on the bottom left?