Two sleeping bags worth lining up side by side. On the data the Ascent 15F is the stronger all-round pick, and the question is whether the Trail Lite Down 20 still fits your budget or priorities.
| Sea to Summit Ascent 15F | The North Face Trail Lite Down 20 | |
|---|---|---|
| GearScore | 85✓ | 64 |
| Comfort rating | 29 °F✓ | 30 °F |
| Weight | 2 lb 4.0 oz✓ | 2 lb 4.2 oz |
| Warmth-to-weight | 4.0 /100g✓ | 3.9 /100g |
| Packed size | 7.5 L | n/s |
| Fill power | 750 FP✓ | 600 FP |
| Price | $419 | n/s |
| Fill | Down | Down |
| Style | Bag | Bag |
| Shape | Mummy | Mummy |
Highlighted cells mark the better spec: Ascent 15F in blue, Trail Lite Down 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 Sea to Summit Ascent 15F and The North Face Trail Lite Down 20 take different routes to the same job. The Ascent 15F is the stronger pick on most of the specs that matter, while the Trail Lite Down 20 makes its case on price.
The Ascent 15F is warmer (rated 29°F vs 30°F), 1 oz lighter, and stronger on warmth-to-weight. On the default GearScore the Ascent 15F leads 85 to 64.
Pick the Ascent 15F if you care most about warmth and low weight, which makes it the better call for colder nights and shoulder-season trips. Pick the Trail Lite Down 20 if you would rather save the difference.
The Sea to Summit Ascent 15F. It is warmer (rated 29°F vs 30°F) than the Trail Lite Down 20.
The Sea to Summit Ascent 15F. It is 1 oz lighter than the Trail Lite Down 20.
The Sea to Summit Ascent 15F, 85 to 64 on the default algorithm. You can re-weight the factors to match your trip.
The Ascent 15F is the stronger all-round pick here. Choose the Trail Lite Down 20 if it is the better value for you.