Designed for all season use and maximum heat retention. Stops cold air penetrating the base layer of the sleeping bag. Thermal foot pocket for increased insulation in this area. Improves the comfort of the bed you sleep on. Designed to be used on its own or under a sleeping bag. Q700 Hollow fibre insulation. Elasticated head and foot fixings coupled with bed fixing strap. Supplied in compression sack. Weight: 1.25kg. Dimensions: L215cm x W90cm.