This thread is going to deal with one of the most important pieces of equipment that a soldier, survivalist, prepper, or even a off grid homesteader can have, the sleeping bag. If their is one single piece of field gear that is universally found in any soldier’s ruck, a BOB, a 72 hour kit, or even in a winter kit in a car. The lowly sleeping bag is it, and I would like to start this thread by comparing two of the most widely available surplus military sleeping bags, the ECW down/poly mummy bag, and the newer ECW Modular Sleep System. So, I will start this review of the older down/poly bag. This are available for around $100 on the surplus market and are rated for -10 Fahrenheit. What I have done during the cold snap we have had is to shut my bedroom door and opened all windows and simply slept in both bags during the nights with single digit/below zero temps. Now, my bedroom does not have any heat registers, so I tacked a couple of heavy comforters on both side of my bedroom door to keep the cold air from getting into the rest of the warm house. The pros with this bag is that it is a very warm bag to sleep in. For my night clothes, I slept in a set of issue poly pros and a good set of wool blend socks. Not once did I wake up cold. This bag is also very roomy and allows for a lot of wiggle room to get comfortable. During my first AD enlistment, this was the bag that I had issued to me even though I served my entire enlistment at Ft. Bliss TX. For all the field problems I did, the ECW bag I was issued served me well. For the cons. This bag is HEAVY, I am talking 10.5 pounds heavy and with it’s heft, it is also bulky. This issue bag would take up quite a bit of room in my old a.l.i.c.e. Large ruck, or my issue duffle bag. This bag does not come with any type of water repellent cover and because of the Down filler, if this bag gets wet, you will loose all it’s insulative properties, but I do have a Gore Tex bivy sack from a MSS that I keep with the bag, but as I will go into more detail later, the MSS is my go-to bag. I would also like to see some input from others on what you use, even if you have the ultra expensive Wiggys and other civilian brands. Coming up in a few days will be a full review of the ECW Modular Sleep System.