All 47 down, synthetic and winter sleeping bags we track, in one place. Sort by weight, price or lab-tested comfort rating, then narrow it down by type and brand.
47 products, lightest first
Summer ultralight#1Mountain Equipment
Mountain Equipment's lightest bag at 420 g, rated comfort 16 °C for summer trips, from £150.
From
£149.96
at Alpinetrek
11 photosUltralight down#2Rab
500 g of 900 FP hydrophobic down, ISO comfort 5 °C / limit 0 °C, packing to 16 × 30 cm.
From
£399.95
at Cotswold Outdoor
8 photosLightest#3Sea to Summit
A 510 g summer-to-shoulder-season bag for fast-and-light trips.
From
£270.87
at Alpinetrek
11 photosSummer down#4Mountain Equipment
660 g of summer warmth with a +7 °C comfort rating, often discounted at Cotswold.
From
£199.95
at Cotswold Outdoor
Lightest premium#5PHD (Peak High Designs)
Made in Sheffield with 900 FP down: 670 g for a bag PHD rates to -5 °C.
From
£631
at PHD
7 photosCheapest down#6Decathlon Simond
A 700 g summer down bag with lab-tested ISO ratings for under £100.
From
£99.99
at Decathlon
5 photosThree-season all-rounder#7Marmot
740 g of 800+ FP goose down, ISO-tested comfort 2 °C / limit -3 °C, from about £359 in the UK.
From
£358.90
at Hardloop
11 photosBest value#8Alpkit
Hydrophobic 750 FP RDS down with a -4 °C comfort rating for under £300, direct from Alpkit.
From
£274.99
at Alpkit
Lightest for warmth#9Cumulus
Polish-made 850 FP goose-down bag that undercuts the big brands; ships from Poland.
From
£289
at Cumulus
11 photosBest all-rounder#10Mountain Equipment
The 3-season benchmark: 0 °C comfort at 820 g, widely stocked and often discounted.
From
£240
at Trekitt
Budget down#11Decathlon Simond
A no-frills three-season down bag that undercuts the outdoor brands by £100.
From
£149.99
at Decathlon
Premium pick#12Rab
Rab's hand-filled 800 FP classic, now named by temperature: 0 °C comfort at 870 g.
From
£401.76
at Alpinetrek
Value shoulder-season#13Decathlon Simond
0 °C ISO comfort under a kilo, for spring and autumn camps in the hills.
From
£169.99
at Decathlon
10 photosFirst down bag#14Mountain Equipment
Mountain Equipment's entry-level down bag: 940 g, comfort 1 °C, from £140 discounted.
From
£140
at Trekitt
Lightweight synthetic#15Rab
960 g synthetic mummy with an ISO comfort of +5 °C, from about £120 at UK specialists.
From
£111.95
at Absolute Snow
2 photosThree-season plus#16Mountain Equipment
-1 °C comfort in a box-walled bag that bridges three-season and winter.
From
£320
at Adapt Outdoors
9 photosWarmest lab-rated#17Alpkit
An EN-rated -10.5 °C comfort bag at under 1 kg for £350, direct from Alpkit.
From
£349.99
at Alpkit
Best for kids#18Mountain Warehouse
A child-sized envelope bag rated for mild summer camping.
From
£24.99
at Mountain Warehouse
7 photosBudget trekking#19Decathlon Simond
An ISO-rated synthetic trekking bag at a campsite-bag price.
From
£64.99
at Decathlon
8 photosLight winter down#20Rab
ISO comfort -5 °C from 1070 g, using 600 g of 800 FP goose down and a 10D/20D Pertex Quantum shell.
From
£484.99
at Ultralight Outdoor Gear
8 photosWarmest for weight#21Sea to Summit
850+ fill hydrophobic goose down and double draught collars: -10 °C comfort at 1.1 kg.
From
£516
at Rock+Run
11 photosRoomy camp down#22Sea to Summit
A roomy 1119 g down bag with ISO comfort 3 °C that unzips flat into a quilt; around £211 discounted.
From
£210.67
at Alpinetrek
6 photosRoomy trekking#23Sea to Summit
Roomy relaxed-mummy synthetic bag, ISO comfort +3 °C, with a second half zip for venting.
From
£144.99
at Ultralight Outdoor Gear
Premium pick#24Cumulus
700 g of 850 FP Polish goose down in a 1.15 kg bag rated to -10 °C comfort; direct from Poland.
From
£399
at Cumulus
5 photosMost packable#25Snugpak
UK-made Softie insulation that compresses to the size of a loaf, rated to 0 °C by Snugpak.
From
£127.50
at John Bull Clothing
8 photosBest all-rounder#26Mountain Equipment
Recycled Polarloft insulation with a genuine +1 °C ISO comfort rating at 1.2 kg.
From
£129.99
at Ultralight Outdoor Gear
2 photosBest all-rounder#27Mountain Equipment
Trapezoid box-wall baffles and traceable duck down for a -6 °C comfort rating at 1.2 kg.
From
£322.12
at Alpinetrek
2 photosPremium synthetic#28Rab
A synthetic bag with a real ISO 0 °C comfort rating, for damp trips where down struggles.
From
£142.16
at Alpinetrek
DofE value#29Vango
DofE-recommended 1.34 kg mummy with an ISO comfort of +3 °C, under £60 on sale.
From
£56.95
at Attwoolls Outdoors
2 photosBest all-round winter#30Rab
Rab's workhorse winter bag: ISO -5 °C comfort with hydrophobic down.
From
£305.95
at Snow+Rock
7 photosBest value#31Alpkit
900 g of recycled RDS down and a roomy cut for under £250, direct from Alpkit.
From
£249.99
at Alpkit
Cheapest adult bag#32Mountain Warehouse
A roomy square bag for summer campsites and festivals, often half price.
From
£29.99
at Mountain Warehouse
8 photosBest for DofE#33Decathlon Simond
0 °C comfort in synthetic fill for £80: the sensible expedition bag on a budget.
From
£79.99
at Decathlon
9 photosExpedition#34Mountain Equipment
ME's lightest expedition bag: 831 g of 800 FP goose down, rated to -23 °C, 1490 g in total.
From
£482.44
at Trekitt
2 photosTravel and festivals#35Snugpak
1.5 kg travel bag with a built-in mosquito net and a -3 °C brand comfort rating, from about £50.
From
£49.99
at Summits
7 photosBest value#36Vango
A lab-tested ISO comfort rating of +2 °C for around £40, from the brand on every campsite.
From
£39.99
at Norwich Camping & Leisure
7 photosCheapest ISO winter#37Decathlon Simond
The cheapest lab-tested -5 °C bag we found. Heavy, but it shrugs off damp.
From
£79.99
at Decathlon
5 photosCheapest 3-season#38Vango
A square-cornered campsite bag with an ISO +2 °C comfort rating for about £34.
From
£33.99
at WM Camping
Best value deep cold#39Rab
ISO comfort -10 °C for £390 or less: 880 g of 650 FP hydrophobic duck down in a roomy wide mummy.
From
£347.55
at Hardloop
7 photosBudget mummy#40Highlander
A 0 °C mummy bag from the Scottish brand, for DofE and spring camps.
From
£59.95
at Camping Online
7 photosWarmest#41Vango
An ISO-rated -1 °C comfort bag for under £50. Heavy at 1.9 kg, so one for the car boot, not the rucksack.
From
£39.95
at Attwoolls Outdoors
2 photosSynthetic winter#42Snugpak
UK-made synthetic winter bag rated to -10 °C comfort for about £160–£212, 2 kg standard size.
From
£159.99
at Dragon Supplies
Cheapest 0 °C#43Mountain Warehouse
0 °C comfort for £35 on sale. Heavy, but hard to beat for the money.
From
£34.99
at Mountain Warehouse
4 photosBest for car camping#44Decathlon Quechua
A roomy rectangular campsite bag with a real 0 °C ISO rating.
From
£59.99
at Decathlon
4 photosBest double#45Highlander
A two-person campsite bag for under £40, ISO rated for summer nights.
From
£36.92
at Wylies Outdoor World
6 photosBest synthetic#46Snugpak
Military-grade synthetic bag with an expansion panel and boots-on foot, rated to -15 °C by Snugpak.
From
£126.95
at John Bull Clothing
2 photosBudget winter#47Snugpak
A British-designed winter bag rated to -12 °C by Snugpak, at under £70.
From
£67.99
at Summits
Weights and sizes are manufacturer figures. Prices were checked on 31 October 2026 and change daily, so confirm on the retailer's site.
Each type has its own comparison with a buying guide written for it.
