Two mainstream brands that approach the sleeping bag differently. NEMO is the cheaper, more varied line, with synthetic options and relaxed spoon-shaped bags, while Sea to Summit runs lighter and all-down with higher fill power. The split is value and versatility against weight.
| NEMO | Sea to Summit | |
|---|---|---|
| Avg. GearScore | 75✓ | 72 |
| Avg. warmth-to-weight | 3.6 /100g | 4.8 /100g✓ |
| Avg. weight | 42.4 oz | 28.4 oz✓ |
| Avg. price | $341✓ | $480 |
NEMO and Sea to Summit both sell well-made bags at the more accessible end of the premium market, but they pull in different directions. NEMO fields a varied lineup that mixes down and synthetic fills, includes recycled Endless Promise models, and builds several bags in a roomy, spoon-shaped cut for people who move in their sleep. Sea to Summit runs all down in our catalog, in a more traditional mummy cut, and chases lower weight.
The numbers frame the trade. NEMO is cheaper on average and offers synthetic bags that Sea to Summit does not, which is part of why its average weight runs higher, since synthetic and roomier bags weigh more. Sea to Summit is lighter on average and uses higher average fill power, so its down bags pack smaller and weigh less for their warmth. What you are choosing is NEMO's price and versatility against Sea to Summit's lighter, all-down build.
How to choose: pick NEMO if you want to spend less, prefer a synthetic bag for wet or humid trips, or sleep better in a wider spoon-shaped cut. Pick Sea to Summit if weight and packed size lead your list and you want a higher-fill-power down bag in a traditional mummy shape. For weight-conscious backpackers Sea to Summit's down bags have the edge, while NEMO covers value and wet-weather needs more broadly. Compare the specific models on the full bag comparison.
NEMO, on average. It reaches lower price points, partly through synthetic fills and recycled Endless Promise models. Sea to Summit’s all-down lineup runs pricier on average, though its higher fill power is part of what you pay for.
Sea to Summit averages lighter here, because it is all down and uses higher fill power, which lofts more warmth per gram. NEMO’s average is pulled up by its synthetic bags and roomier spoon-shaped cuts, which weigh more. Compare specific down models for a fairer weight read.
Yes. NEMO offers synthetic-fill bags alongside its down, which helps on wet or humid trips where down can lose loft. Sea to Summit’s lineup in our catalog is all down, so for guaranteed warmth when damp, NEMO is the more direct option.
NEMO, often. Several of its bags use a relaxed, spoon-shaped cut with more room at the elbows and knees, which suits people who shift onto their sides. Sea to Summit’s traditional mummy cut is trimmer and lighter, better for back sleepers who want to save weight.