I have this sleeping bag for trekking in the summer and autumn use and find it excellent. At night it went down to 13 ° and there it remained with T-shirt in a sleeping bag for me (m, 1.80) nor tidy warm. This matches the official specification of the limits below 12 ° I would no longer use the sleeping bag, as it freezes. But he is excellent in the low price range MMN for this achievement. The weight is about 550g. The material is pleasant.