Atom Ant wrote:
when they pool, they stretch in the middle, just like an awning.
Not trying to pick a fight, but so what? As fj12ryder noted and we have experienced, pooling is not a problem as the water either evaporates or rolls off when we bring the slides in. No harm. no foul. While I wouldn't allow that on my awning as the larger size would cause water weight issues there, from our experience, pooling on a slide topper has never caused any damage for us.
We have them and like them. And we've been camping in pretty much every state between Utah and Maine in all kinds of weather except for heavy snow. I'm just sharing my opinion based on my experience. Feel free to flame away if we don't agree.