Bump up the warmth of your sleeping bag with the Rab Traveller Sleeping Bag Liner. Available in poly cotton and 100% silk versions, these liners deliver additional warmth and comfort for chilly nights. The traditional rectangular cut won't restrict you as you find a comfortable sleep position, and it plays nice with mummy-style sleeping bags as well. And if you're using it as a travel sheet for staying in a hotel or a hostel, the split top design lets you fold over the top of the liner for a feeling that's more like your bed at home.