Hey John! I don't remember what the top material is, but I believe it is momentum. I bought it from someone here, and it is my favorite bivy.
That pitch is a crazy hybrid. It's a cross between an A frame and flying A pitch. I guess "brawny style w/ a high front corner" is about as good a description as any :P. You basically stake down 3 corners, raise the last corner, then jam your pole under the footend so it doesn't flatten out on you. That's my "I doubt it's going to rain,so I'll just throw it up quick" pitch.
Yeah, I look thrilled in the Ophelia pics. I actually was having a great time, rain and all. I laid my head down at Chairback Gap shelter around 7:30pm and within 5 minutes it was coming down in buckets, and rained HARD all night. I couldn't afford to zero the next day, so I put on my game face and went for it.