i went on a short trip this weekend with the same bivy we have and i got stuck in high winds with a thick fog. the fog dripped all night. but the bivy kept me warm and dry. i woke up in the morning with a big puddle at my feet on the bivy. it sweat inside a little inside and i was nervous if it would hold up but it did alright. i would have to agree that i wouldnt want to get caught in the rain with it though. a curious little critter that night though pawed at my bivy. smile that however was one time that i have to admit i would have been more comfortable in a tent.