Instruct: Classify the given review as either positive or negative.
Query: Good summer bag

I bought the 30 degree Lafuma bag to save bulk and weight during summer backpacking trips (my other sleeping bag is a 0 degree bag). The Lafuma bag was warm enough during the summer. However, I wore long johns at night during a 4 day summer trip where it rained almost every night and got down to 40 degrees. I would not use the bag for temperatures lower than 40 degrees. The bag compacts very small and was perfect for summer. I think it would also serve well as a down liner for winter camping trips.