Alpkit
Alpkit SkyeHigh 900 down sleeping bag
Best use
- Made for
- Winter mountain
- Not for
- Bikepacking
Why these labels
- Winter mountain: The maker states this use, and the published specs do not rule it out.
- Bikepacking: Bulky for bike bags: packs to 16.7 litres
From the maker's stated use and the published specs.
- Summer wild camp: 5/10 UK, roughly May to September, nights above about 8 °C, sheltered pitches.
- Three-season hills: 6/10 UK hills in spring and autumn. Wind, rain, and nights near freezing.
- Winter camp: 8/10 UK winter or high ground. Below freezing, strong wind, possibly snow.
- Weight: 4/10 How much it adds to your pack, compared with the whole market.
Comfort -6 °C, limit -13 °C (EN 13537).
Winter and shoulder-season camps down to about -6 °C comfort on a budget
- Comfort
- -6 °C
- Limit
- -13 °C
- Fill
- 650 fill down
- Weight
- 1.42 kg (Regular)
Packed size 16.7 L, 37 cm long and 24 cm across Compare with a 2-litre bottle
A bit longer than a 2-litre bottle and about two and a half times as wide. Drawn to scale.
Where to buy
Alpkit £249.99 In stock. Free delivery. Pre-order, despatch from 2 November. Free UK delivery over £60.
View at shop: AlpkitPrices checked 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
From maker's figures 9/10How cold a night you can sleep comfortably through. 9: Among the best you can buy for this.
Alpkit publishes EN 13537 ratings of comfort -6 °C and limit -13 °C, which is in the -5 °C or colder band. The maker's figure; Live for the Outdoors repeats it and calls it modest for a winter bag. Alpkit's own 'AK Sleep Limit' of -11 °C is not used.
Room inside
Estimate: only 1 review about room inside (fewer than the 3 we need, so never above 8) 8/10How much room to move, bend your knees and sleep on your side. Roomier is comfier. 8: Clearly better than most.
The one review we found calls the cut roomier than most mummy bags, a plus for side sleepers and restless sleepers, though it may leave some cold dead space. Only one source so far.
Weight
From maker's figures 4/10How much it adds to your pack. 4: A bit below average.
1,420 g for the Regular (stuff sack 115 g extra, so 1,535 g in the sack; Live for the Outdoors weighed 1,541 g with sack) sits in the 1,300-1,699 g band.
Packed size
From maker's figures 1/10How much room it takes in your rucksack. 1: A real weak point.
Alpkit gives only the pack size, 37 x 24 cm, so it is worked as a cylinder: 3.1416 x 12 x 12 x 37 = 16,739 cm3, so 16.7 L, in the 13 L+ band. Live for the Outdoors gives the sack as 35 x 22 cm in its text and 35 x 25 cm in its table (13.3 to 17.2 L), still in the same band.
What reviewers say (out of 10)
Ratings marked * are from reviews and are not part of the trip score. They are reviewers' scores, not our own measurements. How we score
Comfort to sleep in*
Reviewers' average 8/10How comfy the shape, hood and fabric feel; not the temperature rating.
3 reviews on comfort to sleep in, e.g. "It’s warm, comfortable and durable, with good features including an adjustable hood, cosy footbox".
Zip*
Reviewers' average 8/10How smoothly the zip runs without snagging.
3 reviews on zip, e.g. "The zip slides reasonably smoothly".
Reviewers disagree on this.
In short
Good for
- Winter and shoulder-season camps down to about -6 °C comfort on a budget
- Campers who want a roomy bag and who carry the bag in a rucksack with space to spare
Strengths
- 900 g of 650+ fill power RDS-certified duck down with box-wall baffles, a draught collar and an adjustable hood
- Roomy cut with a 75 cm internal width, so it suits side sleepers and people who feel boxed in
- Two-way 3/4-length YKK zip, a zipped inside pocket, and a cotton storage bag and compression sack included
- 3-year Alpine Bond guarantee
Weaknesses
- Bulky: about 16.7 L packed by Alpkit's figure (13.3 to 17.2 L by Live for the Outdoors' measure, which still lists a small packed size as a pro)
- Comfort -6 °C is milder than many winter bags (Live for the Outdoors found rivals at -9 to -12 °C), so it is mid-range for a four-season bag
- Down is 650+ fill power and not water-repellent, so damp is a bigger risk than with treated down
- Roomy cut can leave dead space and cold spots for people who prefer a snug fit; one reviewer also found some hardware basic
- Only a pre-order from Alpkit at the time of our check, with despatch from 2 November; no other UK shop found
- Short on independent evidence, so damp performance, comfort and durability are estimates, not reviewed scores
Sources
We haven't tested this ourselves. Every score comes from these specs, tests and reviews.
ShowHide sources (5)
- Alpkit: SkyeHigh 900 product page (EN 13537 ratings, weight, packed size, fill, price)
- Live for the Outdoors: Alpkit SkyeHigh 900 Sleeping Bag Review (James Forrest, updated 20 May 2025)
- The Backpacking Geordie (YouTube): Four season winter sleeping bag, SkyeHigh 900 (owner's first night out; video, auto-captions read)
- Live for the Outdoors: Alpkit SkyeHigh 900 Sleeping Bag Review
- Alpkit: SkyeHigh 900 customer reviews (44 reviews, 43 of them 5 stars)