From my ground dwelling days- This is the classic design from Tarptent, before the Squall 2 and the same design Gossamer Gear uses for the Classic Squall, this one is in silnylon and the GG is made of spinnaker fabric This has the one piece beak that closes with velcro on the side, not center. Does have T-shaped zipper door. I got it used and I repaired a tiny hole in the side netting with a circular patch (repaired completely). This is an excellent UL tarptent. Tent,stuffsack, curved rear support pole, all guylines attached, no stakes =30oz. Been out on a single weeks trip. Fully seam sealed with stuff sack. selling $100 including shipping in the continental US only. Paypal please, overseas pays actual cost of shipping. any questions just PM. thanks- Craig you can see the set up here. http://www.youtube.com/watch?v=rsDI5MxQV28