I recently picked one of these up ($10) as I’ve been a fan of the Heatsheet blankets- much more durable than the chincy little silver ones you often see list as emergency blankets. I’ve had the Heatsheet ones out on planned overnighters and was able to reuse them (albeit repacking them to original size took a little bit, but is doable). I liked the idea of a poncho/blanket over the normal Heatsheet for a couple of reasons. The poncho design would readily let you use this on the move, in addition to a static situation. It has a hood. With some creativity (and duct tape) you could do something similar with a Heatsheet, this is easier. On the move I would probably layer this under a windshirt (I don’t leave home w/o a windshirt :) ), this would prevent wind from getting under the poncho. The poncho weighs 2.7 oz on my scale w/ the little cover provided, my two person heatsheets weigh 3.2 oz. The poncho measures 50″ across and 38″ in length (excluding the hood), if one wanted to you could easily slit the sides and use it as a small tarp (50×76″). For static use on an unexpected night out, I plan on carrying a couple of small beeswax candles (0.9 oz/each w/ ~ 4 hours of burn time) and use it like the old Scout fire- sitting (with insulation underneath) and a candle vs a small fire. I’ve done this with the Heatsheets and it’s effective method for staying warm. This should fit the bill for anyone wanting a little insurance on day hikes/runs and should easily fit into even the smallest of running packs. This post is a little timely as last weekend I joined the local running group for a 20-ish mile run in the Elkhorns and we had someone unknowingly get way off the trail and was forced to spend the night out without much at all except the clothes on her back. She “burrowed” into a thick Juniper and spent a very uncomfortable night out, but luckily the temps hadn’t dropped as much as they did the previous couple of nights (at the start of our run all standing water was covered with a decent layer of ice). She was found the next day mid-morning. I certainly felt a lot better knowing that I had this poncho and a couple of candles in my pack, had I been the one stuck out for the night. 
