Grey duck down 90/10
Exceptional 90/10 grey duck down fill, with a fill power of 650 cuin (EU standard). The ideal balance between insulation and affordability.
Swing CO 850
4-season sleeping bag – 90/10 duck down
$384.00 USDexcl. tax
Size
Zip
Size S — Up to 165 cm
90/10 duck down
650 cuin
Asahi-KASEI®Nylon 6-6 Ripstop
1.277 kgincluding 813 g of down
10.5 L
compressed
In stock — dispatched within 2 working days
Temporarily unavailable
Free shipping
30-day returns
Guaranteed aftercare
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The Swing CO 850 is the 4-season sleeping bag in the Swing CO range: 18 100% anatomical compartments with a tubular cut and 852 g of 90/10 duck down, 650 cuin (size M), for mountaineering, winter bivouacs and Nordic expeditions. Versatile and zip-compatible, it handles serious winter conditions without sacrificing everyday comfort.
Designed for alpine winters
- 3D pre-shaped hood: anatomical profile with a face drawcord for a precise fit around the face in winter conditions.
- Generous draught collar: traps warmth around the neck and shoulders on the coldest nights.
- Trapezoidal footbox: compartmentalised footbox for the best balance of protection and warmth.
- Draught tube: internal reinforcement along the zip with an outer storm flap – protection against draughts at the zip.
- Inside pocket: secure storage for night-time essentials without getting out of the bag.
-
Zip-compatible with the Swing CO range: near full-length 172 cm zip, the same on all sizes S, M and L. Compatible with the Bloody Mary.
The companion for alpine winters and Nordic expeditions, from technical mountaineering to impromptu bivouacs in the snow.
Supplied with a compression sack with straps and a DELCER storage sack.
| Comfort temperature(ISO 23537 standard) | -9.0°C |
|---|---|
| Limit temperature(ISO 23537 standard) | -16.0°C |
| Extreme temperature(ISO 23537 standard) | -37.0°C |
| Down | 90/10 duck down 650 cuin (EU) |
| Outer fabric | Asahi-KASEI® Nylon 6-6 Ripstop 41 g/m², with PFAS-free durable water-repellent (DWR C0) treatment |
| Inner fabric | Asahi-KASEI® Nylon 6 42 g/m² with PFAS-free durable water-repellent (DWR C0) treatment |
| Zip | YKK® zip with reversible slider |
| Construction | 18 compartments, Pre-cut anatomical H-box baffles |
| Total weight | 1.277 kg (S) · 1.347 kg (M) · 1.442 kg (L) |
| Down weight | 813 g (S) · 852 g (M) · 891 g (L) |
| Compressed volume | 10.5 L (S) · 11.0 L (M) · 11.5 L (L) |
The size of your sleeping bag directly determines its thermal performance. Too big, and your body has to heat excess air and loses efficiency. Too small, and the down gets compressed at the feet and hood, exactly where it needs its loft to insulate.
A bag fitted to your height eliminates this dead space without crushing the fill. It also lets you keep cold-sensitive items close to your body: batteries, water bottle, gas canisters… which lose capacity or may freeze during the night.
Size S · Up to 165 cm
- Shoulders
- 154 cm
- Hip
- 128 cm
- Feet
- 93 cm
Size M · Between 165 and 180 cm
- Shoulders
- 158 cm
- Hip
- 132 cm
- Feet
- 96 cm
Size L · Between 180 and 195 cm
- Shoulders
- 169 cm
- Hip
- 143 cm
- Feet
- 106 cm
Between two sizes? Choose the larger size.
Craftsmanship & materials
Asahi-KASEI® Nylon 6-6 Ripstop
Nylon 6-6 Ripstop fabric with a PFAS-free durable water-repellent (DWR C0) treatment, for greater abrasion and UV resistance.
Anatomical tubular baffles
This complex system of pre-cut 3D baffles follows the shape of the body at rest. It ensures ideal down distribution, eliminates cold spots and maximises loft all around you.
Complete your kit
Optimise your thermal comfort by pairing your sleeping bag with our down clothing and accessories. Designed to work together, they push back the limits of the cold.
Customer reviews
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30 years by your side
Your Swing CO 850 is a lasting investment. To ensure its longevity, the Valandré team handles its care and repair, whatever its year of manufacture, so that it keeps its original performance.
Discover aftercareAverage turnaround: 3 weeks
Expert washingRestores original loft
Down refillBrings tired compartments back to life
Zip replacementOriginal YKK® zips
Seams & repairsAssessment and full restoration
