My new vango helium is the same kind of design but there's a little clip at the bottom of the door zip to keep it shut. Wind changed direction here earlier today and it's howling in straight off the north sea right now and I'm toasty warm and dry It's slightly heavier, about a kilo iirc, but the pole hoop is angled rather than U shaped which is meant to give more headroom.The single pole loop design can be a bit of a pain too. During the night here the wind changed direction and pushing the the loop out of shape causing the door to open over time. About the third time this happened I got annoyed and rived the zip closed which bent the pole which made things worse to the point I had to pack up at about 4am. In hindsight I should have just got up when it first happened and adjusted things
I'm looking at getting one of those cheap Lanshan trekking pole tents for summer use when I want more ventilation than weatherproofness.