The Enlightened Equipment Revelation 20 850 reviewed here is the Regular cut, sized for users up to roughly 183 cm with 192 cm of internal length. It's filled with 456 g of grey duck down at 850 fill power, and with a -7 °C (20 °F) limit rating it sits toward the colder end of EE's three-season lineup.
The open-style footbox includes ventilation for warmer nights, while pad attachment loops keep the quilt registered to the sleeping pad through the night. The 10D nylon ripstop shell, treated with DWR, brings this configuration to 639 g — heavier than the ultralight-fill versions, a trade-off for the extra down needed to hit the colder rating. A stuff sack and storage sack ship with it, and the down carries RDS certification with a PFC-free finish.
That lower limit paired with a still-reasonable weight suits hikers expecting near-freezing nights who want a margin over a standard 3-season quilt without stepping up to a dedicated winter bag.