On a windy winter peak last year, a fellow hiker took out a large sheeting of nylon or polyester with a clear window and three of us got inside it, eliminating the wind and dramatically increasing warmth and comfort for a summit lunch. It was called the VCP igloo and cost well over $140. I'm thinking that it really is probably no different than just bringing a lightweight rain fly of a 3-4 person tent that many already own. I'm not sure this would be effective as an emergency bivy since it has no radiant heat inducing properties.
But, it worked for breaktime comfort. Does a tent fly make sense to carry in a day pack or are there superior items to use instead?
But, it worked for breaktime comfort. Does a tent fly make sense to carry in a day pack or are there superior items to use instead?