This tent is by far the best tent I have ever seen. I followed the instructions about wetting it down, then left it up over night to make sure it was really dry. The next day when I removed the upright poles it just sagged a little but stayed up. I had to unzip a door to get it to come down! It was pretty much air tight. I do not think this thing is going to leak. This is a heavy duty tent, that is really well made. I plan to live in it while working away from home this winter. I will update this review next spring. Oh yea, super fast shipping too. Kodiak Tent