Two sleeping bags worth lining up side by side. Both are solid; the right one depends on the specs you care about most.
| Feathered Friends Swift YF 20 | Zpacks Twin Quilt 20 | |
|---|---|---|
| GearScore | 85✓ | 66 |
| Comfort rating | 30 °F | 30 °F |
| Weight | 31.5 oz | 27.9 oz✓ |
| Warmth-to-weight | 4.5 /100g | 5.1 /100g✓ |
| Packed size | 9.0 L | n/s |
| Fill power | 900 FP | 950 FP✓ |
| Price | $599 | $579✓ |
| Fill | Down | Down |
| Style | Bag | Quilt |
| Shape | Mummy | Quilt |
Highlighted cells mark the better spec: Swift YF 20 in blue, Twin Quilt 20 in amber. A blank spec is never counted as a win. A lower comfort rating in °F means a warmer bag, so the warmer bag takes that row. GearScore is the overall rating (0 to 100); re-weight it on the full bag comparison. Prices are current MSRP.
The Feathered Friends Swift YF 20 and Zpacks Twin Quilt 20 take different routes to the same job. The Swift YF 20 wins on balance, and the Twin Quilt 20 pushes back on low weight and warmth-to-weight.
The Twin Quilt 20 is 4 oz lighter, stronger on warmth-to-weight, and higher fill power (950 vs 900). On the default GearScore the Swift YF 20 leads 85 to 66.
Pick the Swift YF 20 if you care most about the overall package. Pick the Twin Quilt 20 if low weight and warmth-to-weight matter more to you, or you are focused on counting grams on long miles.
The Zpacks Twin Quilt 20. It is 4 oz lighter than the Swift YF 20.
The Zpacks Twin Quilt 20. It is stronger on warmth-to-weight than the Swift YF 20.
The Feathered Friends Swift YF 20, 85 to 66 on the default algorithm. You can re-weight the factors to match your trip.
It depends on your priorities. Go with the Swift YF 20 for the overall balance, or the Twin Quilt 20 for low weight. The spec table above shows exactly where each wins.