My PSK, an altoids tin with all the normal stuff, contains a very thin 13 gallon trashbag. This is potentially a good addition to a debris shelter or some other structure. Alone, it would disentigrate before I could get it strung up as a tarp - expecially in any weather that I needed to shelter myself from. with a structure such that it only needed to provide the waterproofing but not the wind or support it might be a very good addition. <br><br>