Add some extra warmth to your sleep system with the tapered microfleece Thermic Neutrino Sleeping Bag Liner. Designed to fit the Rab Neutrino and Neutrino Pro collections, though compatible with other sleeping bags, the Thermic Neutrino Sleeping Bag Liner is built from 130g polyester microfleece for extra overnight warmth. With a tapered mummy shape, a weight of 400g and a compact stuff sack, it’s a valuable cold weather camping accessory. Thermic Neutrino Sleeping Bag Liner