- TEMPERATURE RATING: Comfort rating 29°F, extreme rating 18°F for 700g fill version; comfort 12°F, extreme -2°F for 1000g fill version. Suitable for 0°C environments. - WARM DESIGN: Mummy-envelope hybrid shape keeps head warm with ample foot room. U-shaped neck collar adds warmth; dual draft tubes reduce cold air entry. - PREMIUM DOWN: 650 fill power RDS certified duck down, 700g fill weight, 85% down content. Traceable via QR code on label. - TWO SIZES: Medium (82.7 x 29.5 in, 2.37 lbs) and Large (86.6 x 33.5 in, 2.9 lbs). Can be fully unzipped to use as a blanket. - DURABLE MATERIAL: 400T 20D ripstop nylon shell, waterproof coating. YKK zippers for smooth operation. - VERSATILE USE: Ideal for camping, backpacking, hiking, mountaineering, travel, or hotel use. Compact storage: 7.9 x 16.5 in (medium) or 8.7 x 16.5 in (large). - CARE TIPS: Fluff the sleeping bag the day before use for optimal warmth. Pair with a sleeping pad to maximize insulation.