What do you think? Does one really need a zipper side on a bivy? I was thinking that, if the opening at the face was big enough it would be unnecessary.
Also, how many of you use the bivy tie outs to stake your bivy down?
I am making a bivy for my brother, but I have never used one, and neither has my brother. So any suggestions would be greatly appreciated. My plan is to make one similar to the BMW nano, but I was going to have a permanent bug net at the head opening that could be rolled out of the way. Does the BMW nano have a zip opening on the side?