The Cumulus Comforter L500 is a lightweight goose down comforter filled with 500 g of 850-fill-power down (95/5 down-to-feather ratio), made in Poland. It carries a comfort rating of 4°C and a limit of 0°C, which positions it as a supplementary three-season layer rather than a standalone winter sleeping bag. H-baffle construction keeps the fill evenly spread across its 227 × 140 cm dimensions, and the shell is 7D ripstop nylon Toray Airtastic (19 g/m²) with DWR treatment.
At just 695 g total and with no zipper or hood — it's an open quilt without a footbox — the Comforter L500 works best as a versatile add-on rather than a primary bag: use it as a top quilt over a sleeping pad, as a liner inside another bag for extra warmth, or as a hammock underquilt. Its low weight makes it a useful piece in a layered ultralight system where insulation gets added or removed depending on conditions. It packs down to 26 × 18 cm.
Specifications
Comfort Temperature
4 °C
Limit Temperature
0 °C
Temperature Rating Standard
Manufacturer rated
Season Rating
3-season
Total Weight
695 g (1.53 lb)
Fill Weight
500 g (1.10 lb)
Internal Length
227 cm (7.4 ft)
Shoulder Width
140 cm (4.6 ft)
Packed Size ( Length x Diameter )
26 x 18 (10.2 x 7.1 in)
Insulation Type
Goose down
Fill Power
850
Fill Power Standard
US standard
Down/Feather Ratio
95/5
Shape
Quilt
Baffle Construction
H-baffle
Zipper Side
None (quilt)
Shell Fabric
Toray Airtastic 19 g/m² (7D ripstop nylon), DWR
Water Resistance
DWR treated
Hood Type
None
Foot Box Shape
Open (quilt)
Gender-Specific Fit
Unisex
Country of Manufacture
Poland
Warmth-to-Weight Ratio f(x)
0 °C/kg
Fill Efficiency f(x)
0 °C/100g
Weight per Degree f(x)
0 g/°C
Where to buy
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Category context Quilts (164 products)
Weight
Standard weight· mainstream zone 496–703 g· ranked 119 of 164