Cumulus neo Quilt 600

The Cumulus neo Quilt 600 is the warmest and, by the numbers, the most weight-efficient quilt in the range — 600 g of 900 cuin goose down produces a comfort rating of -8 °C and a limit of -15 °C at 770 g total weight. Its weight-per-degree figure of 51.3 g/°C is clearly the best in the catalog, consistent with the manufacturer positioning it as a premium model. H-baffle construction, a draft collar around the shoulders, and a closed, anatomical shark-fin footbox combine features that aren't always found together elsewhere in the series — on a backless, zipperless quilt, these are exactly the details that determine how much heat leaks out through gaps. Packed size of 26×18 cm (6 l) is, unsurprisingly, the largest in the line. Available in red, made in Poland, with both a stuff sack and storage sack included. With a range reaching down to -15 °C, this leans toward winter and high-altitude use rather than typical summer trekking — though it remains a quilt, and therefore a system that depends on a well-insulated pad underneath.