Has anyone experimented with the use of Tyvek Coveralls for survival incidents? Being involved in a number of different emergency service diciplines, I carry Tyveks in all my response and readiness equipment bags. These suits when purchased with the attached hood and booties are a one piece rain ensemble, tend to hold body heat, and are good for preventing contaminants from reaching the wearer, obviously the intended purpose. Additionally, these suits can be rolled or folded to a very small size and or vacuum packed. One noted drawback is they are not extremely strong, but can be reinforced easily with duct tape. Any thoughts or suggestions.