This weekend, the pad on my Hennessy supershelter failed. I'm not entirely sure what I did. I can only think that I put too much tension on the side pullouts. I quadrupled the elastic and used regular cord to run from the looped elastic to the ground.
The pad ripped right along the stitched line of the edge and the diagonal channel that connects the two side tie outs.
I'll email Hennessy and ask for advice. I'll report my findings here.