The Quantum 250 Endurance is an ultra lightweight down bag designed for summer backpacking, fast Alpine ascents and mountain marathons. (note - due to the water resistant nature of endurance fabric we strongly recommend you air your bag daily. If this is not possible then we advise you consider the Q250) A half length zip and double sliders allow a waist height belay point. Quantum bags are designed to be the lightest for todays weight conscious adventurers. Use of Pertex® Quantum fabric and 750+ fill power down ensures the optimum warmth to weight ratio, in efficient designs to meet the needs of backpackers, Alpine climbers, ski and cycle tourers. All Quantum bags use Pertex Quantum® fabric on inner and outer. All Quantum bags are filled with 96% pure white goose down with a fill power of 750+EU/850+US. Each bag comes with a stuff sac and cotton storage bag. Weight 680g Comfort 0°C Dimensions 210 x 75cm Pack size 11 x 24cm