Off-Set Double Layer Construction - Stitching is offset so cold spots don't form at the stitch lines. The layers are separated using an interlining layer to stop the fill snagging or lumping in the bag 100% Polyester Hexagon Ripstop 210T - A tough hexagonal ripstop polyester that is strong, highly breathable and washable 100% Polyester 190T Pongee - A soft touch Microfibre fabric that is a wonderful cosy, snug and breathable. Single Hole Siliconised Hollow Fibre Insulation - Siliconised fibres reduce matting of filling, increasing durability and maximising the lofting potential for extra warmth. Retains loft in damp conditions Flat Head Rest - An extended area is provided around the head for extra comfort. Insulated Zip Baffle helps to retain body heat within the sleeping bag whilst keeping out colder air. Zip Guard with Anti-catch Piping helps to prevent the zip from snagging on the lining, allowing easy opening and closing Hanging Loops at the foot of the bag allow it to be hung up to air, keeping the bag fresh and dry between uses 4-Strap Compression Stuff Sac - Minimises pack size for easy transportation Mummy Shaped Sleeping Bag - The mummy bag features a design that tapers from the head end to the foot end, reducing its volume and surface area, and improving its overall heat retention properties. Horizontal Stitching, evenly spaced to hold insulation in place and to ensure that it is evenly distributed across the body.