Rab Ascent 300 Sleeping Bag Provides Cozy Warmth and Packability for Nights spent under the starry sky in the countryside. This down bag Rated for temperatures up to 35F Ideal for three season camping. 650 fill European duck down provides exceptional warmth to weight ratio , which means that it retains heat without taking up tons of precious space in your backpack. Down has a hydrophobic coating which prevents moisture from penetrating its heat-retaining upper part. Besides Pertex Quantum fabric not only prevents condensation from seeping through and keeps tall downs moisturized but also made from completely recycled materials which provides environmentally friendly comfort.