The Convert 10 850 sits between the 3-season and full winter tiers of Enlightened Equipment's convertible quilt lineup, rated to a -12°C limit — enough for cold shoulder-season nights without going to the extremes the Convert 0 models are built for. Like the rest of the Convert series, a two-way zipper and open-ended footbox let it switch between a flat quilt and a closed sleeping bag depending on conditions.
Fill is 611g of 850-fill-power duck down arranged in vertical V-baffles, a construction meant to limit down migration within each chamber more than a simple sewn-through design would. Total weight comes to 861g in the Regular cut, sized for users up to about 183cm — worth checking against your height before buying, since EE also offers Short and Long lengths for this model elsewhere in the range.
RDS-certified down, PFC-free DWR treatment and US manufacture round out the spec sheet. It's a reasonable pick for hikers who want one quilt to cover both crisp autumn nights and the occasional harder freeze, rather than owning separate 3-season and winter setups.