Vango Ultralite 300 - 4 season Sleeping Bag Features: 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 40 denier ripstop nylon shell - 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 Supersoft mini ripstop nylon lining - Warm and comfortable against the body Our Thermal Embrace System utilises elasticated thread in the lining to enable the sleeping bag to hug your body. This allows you to move freely when sleeping while the lining wraps snugly around you. It also increases the loft between the inner and outer layers reducing the amount of air around the body for greater warmth Insulite® Superfine insulation is a blend of spiralised, siliconised fibres, which combine to produce a filling that is highly compressible, extremely durable and lightweight 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 hoods 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 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 autolock feature prevents the bag from opening when moving around during the night Reflective tab on zip cover aids finding Tempreture rating: 5c to -15c