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Compare Best Winter Sleeping Bags head to head
Pick any two picks from this list and see specs, current price, pros, cons and reader ratings side by side.
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#4 on this list
Panyam 600
Cumulus
Polish makers building to order with Polish goose down. Fill weight and shell fabric are yours to spec.
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- No reader votes yet
- How we assessed it
- Specification researched
#5 on this list
Neutrino Pro 800
Rab
Hydrophobic Nikwax down and a Pertex Quantum Pro shell. The go-to British bag for damp cold.
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- No reader votes yet
- How we assessed it
- Specification researched
Specs side by side
| Spec | Panyam 600 | Neutrino Pro 800 |
|---|---|---|
| Maker | Cumulus | — |
| Model | Panyam 600 | — |
| Fill Material | Polish Goose Down | — |
| Customizable | Fill Weight & Shell Fabric | — |
| Origin | Poland | — |
| Fill Power | — | 800FP European Goose Down |
| Fill Type | — | Nikwax Hydrophobic Down |
| Shell Fabric | — | Pertex Quantum Pro |
| Zip Length | — | 3/4 length |
| Country of Origin | — | UK (design) |
| Intended Use | — | Winter mountaineering, alpine |
What our reviewers liked and didn't
Panyam 600
- Exceptional warmth-to-weight ratio with high-loft Polish goose down
- Extensive customization options for fill weight and shell fabric
- Meticulous construction prevents cold spots and ensures even insulation
- Highly packable for its warmth, ideal for minimalist expeditions
- Strong durability with quality materials and craftsmanship
- Build-to-order model means longer lead times for delivery
- Not widely available in brick-and-mortar stores for physical inspection
- Limited additional features, focused purely on insulation performance
Neutrino Pro 800
- Excellent warmth for its weight, reliable in deep cold
- Hydrophobic down maintains loft better in damp conditions
- Durable Pertex Quantum Pro shell resists wind and moisture
- Good packability for multi-day winter trips
- High-quality construction and snag-free zipper
- Not the lightest option for those prioritizing extreme minimalism
- ¾ length zipper limits ventilation compared to full-zip models
- Mummy cut might feel restrictive for side sleepers
Prices change constantly — the figure shown is the last verified catalog price, and the buy buttons always go to the current listing.