ENLIGHTENED EQUIPMENT 850 30°F Enigma Used only once - suitable for -1°C Outer fabric: 10D Ultralight nylon Insulation: 850 Fill Power Down Color: ■ Navy/Charcoal From the official website: KEY FEATURES Zipperless design Sewn-closed foot box WEIGHT: 18.17 Ounces (515.12 Grams) *This is not a Revelation, so it does not unfold like a blanket. This is for those who want something lighter and warmer at the feet than the 30f Revelation.