Sea to Summit
Sea to Summit Ember -1 °C Ultralight Down Quilt (Regular)
Best use
- Made for
- Bikepacking, Backpacking and wild camping
- Not for
- Winter mountain
Why these labels
- Bikepacking: The maker states this use, and the published specs do not rule it out.
- Backpacking and wild camping: The maker states this use, and the published specs do not rule it out.
- Winter mountain: Comfort rating 4 °C: too cold for winter nights
From the maker's stated use and the published specs.
- Summer wild camp: 7/10 UK, roughly May to September, nights above about 8 °C, sheltered pitches.
- Three-season hills: 4/10 UK hills in spring and autumn. Wind, rain, and nights near freezing. Capped at 4: needs warmth 7+ (comfort 0 °C or colder).
- Winter camp: 4/10 UK winter or high ground. Below freezing, strong wind, possibly snow. Capped at 4: needs warmth 9+ (comfort -5 °C or colder).
- Weight: 10/10 How much it adds to your pack, compared with the whole market.
Comfort 4 °C, limit -1 °C (EN 13537).
No shop we checked has it in stock
Quilt users who want a very light, small down cover for mild spring to autumn nights
- Zip
- None, none
- Comfort
- 4 °C
- Limit
- -1 °C
- Fill
- 850 fill down
- Weight
- 544 g (Regular)
- Packed
- 5.1 L
Where to buy
Alpinetrek £350.50 Out of stock.
View at shop: AlpinetrekSea to Summit £400 Out of stock. Free delivery over £75.
View at shop: Sea to SummitUltralight Outdoor Gear £339.99 Out of stock. Regular out of stock on 2 Nov 2026 (the Long is in stock at £354.99). Page lists 609 g, the maker lists 544 g for the Regular.
View at shop: Ultralight Outdoor GearPrices checked 1 Nov 2026 to 8 Nov 2026 on each shop's own page; shops can change them. We earn no commission on these links; shops are listed by price. More
Our ratings (out of 10)
1 to 10, compared with the whole market. Each says what it's based on. How we score
Warmth
Estimate from maker's specs: comfort temperature 5/10How cold a night you can sleep comfortably through. 5: Does the job. Average for wild-camping gear.
Estimate from maker's specs
Room inside
Estimate from maker's specs: bag shape (fewer than 3 reviews about room) 5/10How much room to move, bend your knees and sleep on your side. Roomier is comfier. 5: Does the job. Average for wild-camping gear.
No review we found says how roomy it is, so this is an estimate from the bag shape.
Weight
From maker's figures 10/10How much it adds to your pack. 10: The best you can buy for this.
544 g (Regular, maker's table) is under 700 g. Ultralight Outdoor Gear lists 609 g.
Packed size
From maker's figures 7/10How much room it takes in your rucksack. 7: Better than most.
Maker's compressed volume is 5.1 L, in the 4-5.9 L band. The supplied compression sack is an 8 L size, which is not the compressed volume.
In short
Good for
- Quilt users who want a very light, small down cover for mild spring to autumn nights
- Warm-weather wild camps, or as an extra layer over a sleeping bag via Sea to Summit's QuiltLock system
- Side sleepers and restless sleepers who find a bag restrictive
Strengths
- 544 g and 5.1 L compressed, among the lightest ways to cover a person
- 850+ fill goose down with Ultra-Dry Down water-repellent treatment, 350 g of fill
- Open top and drawcord foot box let you vent heat or seal it in
- Straps hold it to a sleeping mat, so draughts at the sides are limited
- QuiltLock snaps let it pair with Sea to Summit bags
Weaknesses
- No standard EN or ISO temperature rating, so the -1 °C figure is the maker's estimate and it is an estimate, not a reviewed score for warmth
- Quilts depend on a good mat and on how well you seal the sides, so real warmth varies more than for a bag
- Thin 10 denier fabric needs care on rough ground
- No independent review of this current Ember found, so comfort, damp performance and durability are estimates, not reviewed scores
Sources
We haven't tested this ourselves. Every score comes from these specs, tests and reviews.