The Katabatic Gear Flex 40 900 is the regular-fit version (up to 183 cm) of this ultralight quilt, filled with 900 fill-power hydrophobic goose down. At 505 g (272 g of that being down) it shares the 4°C comfort rating of the 850FP model but with less fill weight needed to get there. Continuous horizontal baffles and a differential cut spread the fill evenly, and a draft collar limits heat loss at the neck.
The Pertex Quantum ECO Ripstop shell and Pertex Quantum Taffeta liner are recycled, bluesign-certified fabrics with a DWR finish, though unlike some other Katabatic models this one isn't listed as PFC-free. The open, ventilated footbox has no zipper; the quilt attaches to the pad with loop straps rather than carrying its own underside insulation.
The down is RDS-certified, the quilt is made in the USA, and it ships with a stuff sack and storage sack. Packing to 4.5 L, it's a solid three-season pick for hikers up to 183 cm — the higher fill power buys a slightly better warmth-to-weight ratio than the 850 version.
Specifications
Comfort Temperature
4 °C
Temperature Rating Standard
Manufacturer rated
Season Rating
3-season
Total Weight
505 g (1.11 lb)
Fill Weight
272 g (9.6 oz)
Shoulder Width
137 cm (4.5 ft)
Hip Width
117 cm (3.8 ft)
Foot Box Width
102 cm (3.3 ft)
Packed Size ( Length x Diameter )
25 x 15 (9.8 x 5.9 in)
Packed Volume
4.5 l (1.19 gal)
Insulation Type
Goose down
Fill Power
900
Fill Power Standard
US standard
Hydrophobic Down
✓
Shape
Quilt
Baffle Construction
Continuous baffle
Differential Cut
✓
Zipper Side
None (quilt)
Zipper Length
None
Shell Fabric
Pertex Quantum ECO Ripstop
Liner Fabric
Pertex Quantum Taffeta
Water Resistance
DWR treated
Draft Collar
✓
Hood Type
None
Foot Box Shape
Open (quilt)
Foot Box Ventilation
✓
Internal Pocket
✓
Stuff Sack Included
✓
Storage Sack Included
✓
Sleeping Pad Attachment
✓
Size Category
Regular
Maximum User Height
183 cm (6.0 ft)
Gender-Specific Fit
Unisex
RDS Certified Down
✓
Recycled Materials
✓
bluesign Certified
✓
Country of Manufacture
USA
Bag Type
Quilt (top quilt)
Where to buy
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Category context Quilts (164 products)
Weight
Standard weight· mainstream zone 496–703 g· ranked 46 of 164