Alpkit
Alpkit Pipedream 600 ultralight down sleeping bag (Regular)
Best use
- Made for
- Backpacking and wild camping, Winter mountain
Why these labels
- Backpacking and wild camping: The maker states this use, and the published specs do not rule it out.
- Winter mountain: The maker states this use, and the published specs do not rule it out.
From the maker's stated use and the published specs.
- Summer wild camp: 6/10 UK, roughly May to September, nights above about 8 °C, sheltered pitches.
- Three-season hills: 7/10 UK hills in spring and autumn. Wind, rain, and nights near freezing.
- Winter camp: 9/10 UK winter or high ground. Below freezing, strong wind, possibly snow.
- Weight: 6/10 How much it adds to your pack, compared with the whole market.
Comfort -10.5 °C, limit -18.1 °C (EN 13537).
Winter and cold shoulder-season trips in the UK with a high R-value mat
- Comfort
- -10.5 °C
- Limit
- -18.1 °C
- Fill
- 750 fill down
- Weight
- 1.08 kg (Regular)
Packed size 10.4 L, 30 cm long and 21 cm across Compare with a 2-litre bottle
About as long as a 2-litre bottle and about twice as wide. Drawn to scale.
Where to buy
Alpkit £349.99 In stock. Free delivery. Regular, left or right zip. Free 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 10/10How cold a night you can sleep comfortably through. 10: The best you can buy for this.
Alpkit's EN 13537 comfort figure is -10.5 °C (limit -18.1 °C), colder than -5 °C. The maker's figure, not re-tested; Alpkit's own sleep limit is -12 °C. road.cc's coldest night was -4 °C and it was warm.
Room inside
Estimate: only 1 review about room inside (fewer than the 3 we need, so never above 8) 6/10How much room to move, bend your knees and sleep on your side. Roomier is comfier. 6: A bit better than average.
The one review notes a reasonably slim leg area but nothing about room to roll over, so this is a normal-fit score.
Weight
From maker's figures 6/10How much it adds to your pack. 6: A bit better than average.
1,085 g for the Regular (stuff sack another 30 g) sits in the 1,000–1,299 g band. road.cc listed an earlier 1,057 g.
Packed size
From maker's figures 4/10How much room it takes in your rucksack. 4: A bit below average.
Alpkit's table says '⌀30 x 21 cm' for the Regular. Read as 30 cm long x 21 cm across, which matches road.cc's own measurement of about 30 x 20 cm in the compression sack, it is 3.1416 x 10.5 x 10.5 x 30 = 10,391 cm³, so 10.4 L, in the 9–12.9 L band. If 30 cm were the diameter it would be 14.8 L (the 1 band); Alpkit's text also quotes 21 x 18 cm, about 6.2 L, with the second strap pulled tight.
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*
Estimate: only 1 review about comfort to sleep in (fewer than the 3 we need, so never above 8) 8/10How comfy the shape, hood and fabric feel; not the temperature rating.
1 review on comfort to sleep in, e.g. "One feature I really like is the neck baffle with its sculpted shape".
In short
Good for
- Winter and cold shoulder-season trips in the UK with a high R-value mat
- Bikepacking or backpacking where a winter bag has to pack small: about 10 L
- Too warm for summer: road.cc found it fine up to 7 °C without feeling hot, so look at the Pipedream 400 for milder trips
Strengths
- EN 13537 comfort figure of -10.5 °C at 1,085 g, which is light for a winter bag
- 750 fill power RDS-certified duck down (600 g fill) with a PFC-free hydrophobic treatment
- The road.cc review found the down held its loft when the bag got damp, and the slim leg area kept feet warm
- Sculpted neck baffle, full-length two-way zip and a hood cord
- 3-year Alpine Bond guarantee
Weaknesses
- Only two lengths and no short size; a reader comment on UKC says the Regular is snug at 1.78 m
- About 10 L packed, so not as small as the 400
- Maker's pack-size figures disagree with each other (see packed size note), so the score is a best reading
- Only one independent test found (road.cc, 2021, one winter), 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 (4)
- Alpkit: Pipedream 600 Ultralight down sleeping bag (spec page: EN 13537 ratings, weight, pack size, sizes, price)
- road.cc (off-road.cc): Alpkit PipeDream 600 sleeping bag review (autumn and winter use, lowest -4 °C)
- road.cc: Alpkit PipeDream 600 sleeping bag review
- Alpkit: Pipedream 600 customer reviews (127 reviews, 4.8 out of 5)