I got a gore tex bivy sack back in May that I travelled with the last couple months. I figured being gore tex the breathability wouldn't collect much condensation. Prior I have slept rolled up in a trap and condensation sucks. sadly the gore tex didn't seem to matter much and the few times I used it I got a little wet. I also got one without poles and having the damp bivy on my face sucked. It stayed in my pack unused after the trial period. I would have got one with a pole to keep it off my face but that one only came in neon green.