I beat the rain today and got my Formosa cover installed. It is construction of some light material that reminds me a little of Tyvek but is some other breathable material. It came in a nice storage bag and was neatly folded up. Not sure that I will ever it back in the bag as neatly because it is huge. It was easy to install and tighten down.
There are no tie downs in the front but there is elastic at the front of the cover. The cover is so large that it hangs on the ground. I see that as a good thing as it will allow me to put the top up to work on the inside this winter without removing the cover.
There are built in straps in the back the can be pulled to tighten the cover on the van. The bulge on the righthand side is my spare tie.
There are zippers on both sides that allow you to open the front doors. There are also zippers on the back so that you can open the rear barn doors.
The fabric appears to be waterproof as the rain started beading up. It will be interesting to see if water still beads up at the end of the rainy season.