I was excited when I received this bag in the mail and couldn’t wait to get out and test it. Testing bags can be an interesting experience, especially if you are going to be camping when it might be colder than the rating of the bag. Lucky for me this trip was in August and I knew that the temperature was not going to get below 30 degrees. The first night went great. The bag is very comfortable because of the Flex technology. This technology lets the bag stretch and flex, which in turn allows you to move around more freely in the bag while maintaining the bags thermal efficiency. If mummy bags are a little too tight for you usually, this is a bag that you should try. Another great feature on this bag is the sleeping Pad Locks. These are straps that hold your pad under you for a goodnights rest.