The Sonik Bank-Tek Layerz All-Season Sleeping Bag is built around a dual-layer construction with a reversible and removable inner cover, letting you tailor the warmth for summer or winter use and choose between a fleece or smooth polyester lining. The outer shell is made from water-resistant, hard-wearing, and breathable 190T ripstop fabric, while the high-quality silicone-treated hollow fibre fill is designed to hold its loft for consistent heat retention. A revised hood shape aims to accommodate different sleeping positions, with a fleece-lined upper for warmth and a smooth polyester-lined base that makes it easier to move around inside. The head and foot sections both feature drawstrings to help close off cold spots, and a wide fold-out mosquito head net is included for calm summer nights. - Dual layer construction with reversible/removable inner cover; select fleece or smooth polyester lining - Water resistant 90T Ripstop outer material - Full 5-season thickness insulation - High quality silicone treated hollow fibre fill - More efficient internal zip baffles - New improved head and foot hood design - Removable elasticated centre strap - Oversized No. 10 coil crash zips with wide webbing anti-snag guides - Smooth polyester lined base for easy movement - Micro-fleece lined top cover with smooth stubble guard neck lining - Smooth polyester lined base for easy movement - Foot drawstring to eliminate cold spots - Fold out mosquito head net panel - Internal hand warmer pockets/neck baffles - Pillow retaining hood with effective drawstring compression system - Full compression bag