The Revelation 40° 850 is a lightweight shoulder-season piece geared toward spring and summer — the manufacturer rates it as a two-season quilt, with comfort around 10 °C and a limit near 4 °C. Its 274 g of 850-fill-power duck down provides the insulation.
Construction uses box baffles rather than simple sewn channels, which limits down shifting and keeps insulation thickness more even than cheaper sewn-through builds. A differential cut, a trapezoidal footbox with a three-quarter-length zipper, and pad attachment loops round out the feature set; both shell and liner are 10D nylon taffeta. Total weight comes in around 448 g, the down is RDS certified, and it's made in the USA with a one-year warranty.
The footbox zipper lets the quilt open flat for warmer nights or double as a camp blanket, making the Revelation 40° 850 a more versatile piece for summer and shoulder-season trips than a fully closed top quilt.