Wouldn't recommend in summer but other than that seems solid - Sierra Designs Backcountry Bivy Tents

I used this for the first time last weekend. It was high of 90s and Low of 70. I had to sleep on top of it until it was the days low. If you leave the zipper open it cool down quickly but when tied to a tree and unzipped it also allows bugs in. I feel like this could be solid for other seasons but hot hot hot in summer.