Cumulus Magic 100 Zip Sleeping Bag (v2)

The Cumulus Magic 100 Zip is an ultralight summer bag built around maximum weight savings: 105 g of 900-fill-power goose down (98/2 ratio) inside a 240 g bag, with a manufacturer-rated comfort of 13 °C, limit 10 °C and an extreme rating of -3 °C. The baffle construction here is sewn-through rather than H-baffle — simpler and slightly less efficient at preventing cold spots, but it keeps the shell thin. There's no hood on this version, another way the design cuts weight for warm-night use. The shell is Toray Airtastic at just 19 g/m², among the lightest fabrics in the Cumulus range, with a DWR finish. Packed size is 18 × 11 cm at 1.6 litres, internal length 175 cm, suited to users up to about 180 cm. A storage sack is included. Given its minimal warmth margin, it works well as a stand-alone summer bag above roughly 10 °C or as a liner inside a heavier winter bag. The bag comes in navy.