Serious lack of first aid supplies: minor scratches kit, izzy bandage, quick-clot, duct tape/waterproof medical tape, blister bandages, etc.; extra socks (wool or polypro); Boker Cop Tool;leather or nomex+leather gloves;4-way silcock key; something to carry water in; water pure tabs/ water filter bottle; emergency poncho; foil blanket; small am-fm radio. You need an urban emergency kit. A decent one can be assembled with about a 3-4lb. weight factor. I suggest you shift to a laptop friendly, non-tactical backpack.