Fill. When it comes to fill, it’s important to consider where your bag will be used. If there is any chance that it may become wet, then a synthetic filled bag would be more suited over a down one.
Weight. If you’re carrying your own camping gear, then you’ll want a lighter bag. In this case, going for a down filling could be in your favour.
Shape. There are three shapes to choose from, the mummy, semi-mummy and rectangular. The mummy is the most fitted and could be described as snug. In the other two, you’ll have a bit more room to move around in, with the rectangular offering the most wriggle space.
Temperature. We recommend opting for sleeping bags that are offering at least 10 degrees more warmth than you will need. There is nothing worse than shivering your way through a cold night. If you bag is too hot, you can always unzip it.
Your individual needs. If you often feel cold at home and need extra blankets and socks to stay warm, then you need to consider this when you make your purchase. Use caution when selecting your bag so that you are kept snug. Go for one that designed for 20 degrees lower than you expect it to be.
Size. If you’re 6’ tall then you should fit into a regular sized sleeping bag. They are also available in short sizes in addition to long. The latter offers another 6” and will be more comfortable for people who are a little wider too.
Gender. You’ll find that the women’s bags are narrower at the shoulders and wider at the hips than the usual sleeping bags. This is to prevent extra air from circulating to make you coder. You’ll also find that there is extra insulation on the feet and torso to give you that extra bit of warmth.
In summary, it’s important to choose the right 3 season sleeping bag for you needs. Take this list with you when you buy to ensure that you consider all factors.