The Convert 30 850 is the lightest 850-fill-power model in this Convert batch, weighing 647g with 409g of duck down fill. Comfort is rated to 4°C and the limit to -1°C, positioning it as a warm 3-season quilt for typical summer-into-shoulder-season conditions rather than genuine cold-weather use.
Shoulder width is 147cm in the Regular cut, sized for users up to roughly 183cm — worth checking against your build, since a narrower cut saves weight but leaves less room to shift position under the quilt at night. Box baffles in a mixed orientation keep the fill evenly distributed, and both a stuff sack and a separate storage sack are included.
RDS-certified down, PFC-free treatment, and a full-length zipper for switching between open-quilt and closed-bag modes round out the package. It's a sensible choice for warm-weather ultralight trips where 647g buys real weight savings over the Convert 20 or Convert 10 models without giving up the flexibility of the convertible design.