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#4 on this list
Spark 28°F
Sea to Summit
Ultralight down mummy — a great backpacking bag when every gram counts.
- Price
- $269 MSRP
- Reader rating
- No reader votes yet
- How we assessed it
- Specification researched
#5 on this list
Questar 20°
Therm-a-Rest
Recycled 650 down, generous cut, honest budget option for new backpackers.
- Price
- $269 MSRP
- Reader rating
- No reader votes yet
- How we assessed it
- Specification researched
Specs side by side
| Spec | Spark 28°F | Questar 20° |
|---|---|---|
| Temperature Rating | 28°F / -2°C (EN Limit) | 20°F (-6°C) |
| Fill Power | 850+ Loft ULTRA-DRY Down | — |
| Shell Fabric | 10D Nylon | — |
| Lining Fabric | 7D Nylon | — |
| Zipper | Half-length YKK #3 | — |
| Packed Size (Reg) | 3.5L | — |
| Insulation Type | — | 650-fill Nikwax Hydrophobic Down |
| Shell Material | — | 20D Recycled Nylon Ripstop |
| Liner Material | — | 20D Recycled Nylon Taffeta |
| Features | — | SynergyLink Connectors, Toe-asis Foot Warmer |
| Packability | — | Good for volume, not ultra-compact |
What our reviewers liked and didn't
Spark 28°F
- Exceptional warmth-to-weight ratio
- Incredibly lightweight and packable
- High-quality 850+ fill-power ULTRA-DRY Down
- Effective at retaining heat for its weight class
- Streamlined design for minimalist adventurers
- Fabrics are very delicate; requires careful handling
- Snug mummy fit may feel restrictive for some sleepers
- Half-length zipper limits ventilation options
- Higher price point due to premium materials
Questar 20°
- Generous cut offers superior comfort for various sleeping positions
- 650-fill Nikwax Hydrophobic Down provides reliable warmth and moisture resistance
- Good feature set, including SynergyLink Connectors and Toe-asis Foot Warmer
- Durable recycled materials stand up to regular use
- Excellent value for a full-featured down sleeping bag
- Not the lightest or most compressible option available
- 20D fabric, while durable, isn't ultra-lightweight
- May feel too roomy for very cold sleepers who prefer less air volume to heat
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