Ultra-light and thermal sleeping bag for mountaineers, designed for wall bivies and extreme mountain disciplines. Water-repellent treated grey goose down, minimal bulk, and the innovative Bivy Warm System - all for just 600g. Regular version.KDRY™ hydrophobic goose down fillRipstop Nylon 7D shell: rugged, lightweight, water repellent Side 1/2 zip with anti-cold flapBivy Warm System to remove right arm from bag and be active, but stay warmPreshaped hood with tightener / Shoulder collar / Inside pocketCompression sack Millet - Trilogy Edge Reg - Sleeping bag