Design: Uses a full-box baffle construction to accommodate extra down and reduce cold spots Expedition mummy bag sizing provides extra space for layered clothing or extra wiggle room Vertical baffles in the chest optimize the position of down to prevent it from moving during use Full side zipper with 2 sliders provides easy access and extra ventilation options Zipper draft tube, hood, and front neck draft collar all prevent warmth being lost when needed most Ultra-light 7D and 10D fabrics for minimal weight and packed size Contoured mummy shape for comfort and efficient insulation Technology: RDS 850+ Loft Premium Goos ULTRA-DRY Down(TM) for maximum insulation valve Additional Details: Recommended Max User Height: 6'