Two sleeping bags worth lining up side by side. The Swallow YF 20 takes a modest overall edge, led by low weight, but the Swift YF 20 has its own case.
| Feathered Friends Swallow YF 20 | Feathered Friends Swift YF 20 | |
|---|---|---|
| GearScore | 86✓ | 85 |
| Comfort rating | 30 °F | 30 °F |
| Weight | 29.2 oz✓ | 31.5 oz |
| Warmth-to-weight | 4.8 /100g✓ | 4.5 /100g |
| Packed size | 9.0 L | 9.0 L |
| Fill power | 900 FP | 900 FP |
| Price | $589✓ | $599 |
| Fill | Down | Down |
| Style | Bag | Bag |
| Shape | Mummy | Mummy |
Highlighted cells mark the better spec: Swallow YF 20 in blue, Swift YF 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 Swallow YF 20 and Feathered Friends Swift YF 20 take different routes to the same job. The Swallow YF 20 wins on low weight and warmth-to-weight, and the Swift YF 20 pushes back on value.
The Swallow YF 20 is 2 oz lighter, stronger on warmth-to-weight, and $10 cheaper. Their GearScores land within a couple of points (86 vs 85), so neither runs away with it.
Pick the Swallow YF 20 if you care most about low weight and warmth-to-weight, which makes it the better call for counting grams on long miles. Pick the Swift YF 20 if you would rather save the difference.
The Feathered Friends Swallow YF 20. It is 2 oz lighter than the Swift YF 20.
The Feathered Friends Swallow YF 20. It is stronger on warmth-to-weight than the Swift YF 20.
They are nearly tied at 86 and 85 on the default algorithm, so re-weight the score to your own priorities to break the tie.
It depends on your priorities. Go with the Swallow YF 20 for low weight, or the Swift YF 20 for the price. The spec table above shows exactly where each wins.