MSR E-Wing Tarp - 2009 BCS

It states in the spec list that it is 44 square feet. I have a similar one, and I think it should work for your sail, depending on your sail dimensions. Does make a great shelter though.

Yes, the E-Wing could be used as an emergency poncho as it does have a hood. It is made to be an emergency shelter and isn't designed to take prolonged downpours (ie. seams aren't taped and the material is uncoated SilNylon). I've used it in light shower situations and have even been in heavy rain, although for only about 30 minutes. I didn't experience any severe leaks and was pleasantly surprised. It's super easy to set up and can be configured in many different ways. I think it's a must for anyone who doesn't want to carry a full shelter and uses trekking poles. Perfect for long dayhikes and summer weekend backpack trips (making sure the weather will be at least moderately good) where weight and pack size is critical...

I wouldn't recommend using it as a ground cloth due to it's non-coated and super light weight material. It will wear out super fast. The best use is for moderate rainfall protection and sun protection. Once up, it will cover two sleeping bags and not much more. It's real intent is to be used as an emergency shelter (thus the 'E' in E-Wing). It can be used as an ultralight wing in desert conditions, but any super heavy rainfall will cause it to leak.

I've used this wing several times with excellent results. If used in the right conditions, it will give you just enough shelter to not worry. I live in the Rocky Mountain region of the country and often hike in desert conditions.

I am 6'2" tall and it feels too short for me to use if there is any worry over weather. I got it to pair with a bivy sack, but have not actually gotten to test it yet. I still need to seam-seal the ridge. You def don't want to use it before doing so (I've read). You will never get it back into it's original size package but the stuff sack flips inside out to contain the expanded product.

The very top (ridgeline) which is the longest point is 10'.