Benefits from 7 Core Hollow Fibre filling, which is silicone treated to help maintain shape and expand fibres and offset panel stitching helps to keep warm air inside the bag. Non-snag, heavy-duty crash zips. Whole of top layer is micro fleece for maximum warmth and comfort and anti-snag polyester guard webbing. Oversized internal fleece baffles and pillow retainer on base layer. Full length zip around perimeter for attaching to Flatliner 6 and 8 Leg beds. Supplied in stuff sack.