Description A hugely versatile bag which is designed for more extreme conditions. If expeditions such as Mt.Kenya, Kilimanjaro and Everest Base Camp are on your list, then this is the bag that will ensure warmth and comfort when needed most. Features Deferentially cut (outer is cut bigger than the inner) for maximum loft Draft collar to keep the cold air out Elastic (Amplify) stitching to minimize heat loss around hips and knees on outside shell and full elastic inside of bag but gives you room when you need it Internal pocket for valuables and batteries Specifications Weight: 1.71 kg Comfort Temperature Rating: -3°C Lower Limit Temperature Rating: -15°C Extreme Temperature Rating: -20°C Dimensions: 220 x 80/55 Packed Size: 22 x 39 cm Down Ratio: 92/8 Fill Power: 650 Temperature Rating ComfortBased on a 'standard woman' having a comfortable nights sleep. First Ascent Amplify 900 Down Sleeping Bag