Revolutionary new sleeping bag designed with comfort in mind. The sleeping pod offers unrestricted body movement where the unique shape means that you can curl up and turn inside the bag in any position that you find comfortable. Comfort rating +1 to -4.8°C.
I know this is from Very and their delivery times are usually terrible but this has shipped 2 days after ordering.
Has good reviews on Amazon, cheapest there is £30.94 delivered.