This may be a silly idea, but it would be a great addition for my summer pack if effective.
Above 45, Im generally warm unless there is wind. In that case I get a little cbs. I have this nasty habit of trying to set up near or over water though, where its calm all of 3 hours a day. Would a M90 or similar material be enough to block the wind as an UQ? Perhaps a dbl where a pad or climashield could be stuffed in as emergency back up.
A finished product would only weigh ~4 oz with suspension lines.