An alternative to the sleeping bag is the Sleeping Blanket. The Thermarest Auriga Down Blanket is just that, a blanket that has an elasticised foot box which can be slipped over the bottom of a sleeping mat securing it in place. There is freedom of movement under the blanket that doesn’t come with a traditional sleeping bag, and allows easy temperature regulation.
The blanket also has side snaps that can be used to secure the blanket to a sleeping mat or second blanket if so desired.
The blanket is filled with 750+ fill power down, and weighs an amazingly light 624g, and packs down to 15cm x 23 cm. It has a comfort rating of 2°C lending it more to summer camping.