just got a zpacks cuben skirt (i bet it too has an official name but cant remember)....first thing I did was compare it to the sil-nyl RainWrap....I ordered the cuben short because the RainWrap goes to my ankles! I like the shorter zpack model much better, i just want it to cover a pair of hiking shorts-seems like it will stride better too.
Not to take away from zpacks customizing but MLD will custom you up a tarp too.