Sonik SK - Tek Sleeping Bag The SK-TEK Sleeping Bag, offers full 5-season insulation and is extremely efficient at keeping you warm. The high-quality silicone treated hollow fibre fill maintains its loft for maximum heat retention. A new hood design gives maximum versatility and allows enough movement for the bag to form around you no matter what your sleeping position. There is a fleece lined upper for warmth and a smooth polyester lined base for easy movement inside the bag with an additional smooth polyester stubble guard neck lining. The head and foot sections both have drawstrings that allow you to thicken the insulation and eliminate cold spots for a cosy nights sleep. SPECIFICATION - Full 5-season thickness insulation. Full length top flap with tuck-around hand warmer pockets. High quality silicone treated hollow fibre fill. Oversized No.10 coil crash zips. More efficient internal zip baffles. New improved head and foot hood design. Removable elasticated centre strap. ¾ Length zips with easy slide guides. 190T Ripstop outer material. Smooth polyester lined base for easy movement. Fleece lined top cover with smooth stubble guard neck lining. Foot drawstring to eliminate cold spots. Internal hand warmer pockets/neck baffles. Pillow retaining hood with effective drawstring compression system. Full compression bag. DIMENSIONS - L 215 W 90cm. Weight 3.8kg.