Box Wall Construction - Down is contained in compartments within the bag, known as baffles. Box shaped baffles allow down to loft up to its full potential and prevent it from moving around the bag keeping even coverage of insulation from head to toe 30 denier mini-ripstop nylon shell and lining - lightweight, soft to the touch and breathable for comfort. The abrasion resistant and durable qualities of nylon ensure a long lasting sleeping bag while the water resistant finish keeps condensation on the outside of the shell, keeping the insulation dry Down is the highest performing insulation featuring the best loft to weight ratio. The fill of our duck down consists of 95% down, 5% support feathers with a fill power of 700 to ensure a high loft, a warm bag and long life Roll Top Dry Bag Stuffsack to keep your sleeping bag safe and dry in transit 3D Hood with multi-cord closure is tailored to fit the shape of the head. Strategic design means the head and shoulders are kept much warmer during the night. The hood's multi-cord adjustment uses two thicknesses of cord so it can be easily adjusted in the dark Insulated Adjustable Shoulder Baffle stops heat escaping from the top of the bag when moving around at night. The adjustable cord lets you tighten or loosen it increasing both comfort and heat retention 3D Insulated Zip Baffle minimises heat loss through the zip. The 3D shape allows the filling to loft and provide better insulation Half Length Zip to reduce weight while still offering ventilation and easy access to the bag Two-Way Auto-Lock Zip: This versatile two-way zip can be used to seal in warmth or provide ventilation and can be used from inside the bag. The auto-lock feature prevents the bag from opening when moving around during the night Reflective tab on zip cover aids finding and opening the bag at night Zip Guard with Anti-catch Piping helps to prevent the zip from snagging on the lining, allowing easy opening and closing Internal Pocket conveniently placed to provides storage for phones, MP3 players and other small essentials Hanging Loops at the foot of the bag allow it to be hung up to air, keeping the bag fresh and dry between uses Arrow Foot gives a shaped foot area allowing feet to relax into their natural position whilst sleeping without adding excess space in bag Omega Shaping is engineered to position zips and seams in the bottom half of the bag. This gives better heat retention and a neat, comfortable fit around the shoulders Temperature Ratings Independently Measured in Accordance with EN 13537:2002 The woven zip puller allows quick and easy operation of the zip.