The Enlightened Equipment Revelation 0 950 is the flagship version of EE's coldest quilt, using 950-fill-power grey goose down instead of 850-fill to hit the same 0°F (-18°C) manufacturer limit at a lower weight: 764 g against 831 g for the 850-fill Revelation 0, with 572 g of down doing the work — the payoff of higher fill power at the cold end of the range.
Comfort is separately rated around -13°C, giving a sense of the margin between survivable and comfortable at this temperature class. The footbox opens fully flat and adds footbox ventilation, useful for dumping heat on a warmer-than-expected winter night. Continuous baffles and a 10D nylon ripstop shell keep the down in place, and the RDS-certified fill has a PFC-free finish, made in the USA.
This is a genuine winter piece for backpackers who need real cold-weather margin and are willing to pay for it in fill cost — three- and four-season use rather than casual summer trips.