| The bags that pack the smallest are the 850 - 900 fill down bags. Both Marmot and Mountain Hardwear make great bags, but be sure to keep in mind that down will offer no warm if it is wet. Some of the newer synthetic materials pack down pretty small, but like anything else, you get what you pay for. One thing you should be aware of is that to save weight for the backpackers, companies will often use 3/4 zippers in their lighter bags, which is ok until you get hot and need to vent out some heat. I personally have a 900 fill Marmot bag for cold temps, but I'm also impressed with the Mountain Hardwear Phantom bags. |