Comfort: 4°C (39°F) Limit: -1°C (30°F) Extreme: -17°C (1°F) High performance, lower impact. The Rab Solar Eco bags are built with recycled fabrics and recycled Stratusinsulation. Ideal for the mountain bothy goer, the globetrotting backpacker, and the desert bivi in spring conditions, with a wide mummy shape for a comfortable night's sleep. These resilient synthetic bags are filled with 100% recycled Stratusinsulation, and lined and covered with a tough, 20D, recycled Atmosfabric with ripstop. Hardwearing, warm, and dependable, they are fast drying and cope with condensation or damp conditions. The Solar Eco 2 is insulated with a double layer of Stratusinsulation arranged in a concertina structure to trap warm air. The elastic internal quilting brings the lining and insulation closer to the user, helping to reduce pockets of cold air. The localised quilting simply means that the stitching which holds the insulation in place has been minimised to reduce the chance of cold spots.