Synthetic Sleeping Bags

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Find your new sleeping bag with Hannes Find your new sleeping bag with Alpinetrek expert Hannes - Gearhead
Who is the sleeping bag for?

Answer Women Sleeping bags for women are usually narrower and shorter than unisex sleeping bags.

Answer Men/Unisex Unisex sleeping bags are suitable for men and tall women.

Answer Kids Kid's sleeping bags are shorter and narrower than adult sleeping bags. Some models are extendable.

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    40%
    Outwell
    Sleeping Bag Roadtrip Double Synthetic sleeping bag
    Original price £112.95 Price £67.77
    5,0 (1)
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    Grüezi Bag
    Schlafsackwarmer Youth Travel sleeping bag
    Price £49.95
    5,0 (1)
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    40%
    Stoic
    Kid's RovenSt. Sleeping Bag Kids' sleeping bag
    Original price £59.95 Price £35.97
    4,6 (8)
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    55%
    Stoic
    TorsboSt. II Pongee Blanket Blanket
    Original price £85.95 Price £38.68
    4,8 (8)
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    40%
    Stoic
    HaverdalSt. Sleeping Bag Synthetic sleeping bag
    Original price £102.95 Price £61.77
    4,5 (6)
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    25%
    Deuter
    Women's Orbit -5° SL Synthetic sleeping bag
    Original price £111.95 Price £83.96
    5,0 (1)
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    Grüezi Bag
    Cloud Cotton Comfort Synthetic sleeping bag
    Price £139.95
    4,5 (2)
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    Grüezi Bag
    Cloud Decke Synthetic sleeping bag
    Price £119.95
    4,7 (3)
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    Grüezi Bag
    Biopod Wolle Survival Synthetic sleeping bag
    Price £299.95
    5,0 (1)
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    25%
    Deuter
    Orbit -5° Synthetic sleeping bag
    Original price £119.95 Price £89.96
    5,0 (4)
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    25%
    Deuter
    Orbit SQ -5° Synthetic sleeping bag
    Original price £128.95 Price £96.71
    4,6 (7)
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    Grüezi Bag
    Biopod Wolle Goas Comfort Links Synthetic sleeping bag
    Price £229.95
    4,8 (4)
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    15%
    Marmot
    Trestles Elite Eco 30 Synthetic sleeping bag
    Original price £179.95 Price from £152.96
    4,8 (6)
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    Marmot
    Nanowave 45 Synthetic sleeping bag
    Original price £109.95 Price from £93.46
    5,0 (3)
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    Rab
    Solar Eco 2 Synthetic sleeping bag
    Original price £194.95 Price from £165.71
    5,0 (1)
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    Rab
    Solar Eco 3 Synthetic sleeping bag
    Original price £194.95 Price from £165.71
    5,0 (1)
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    Mountain Equipment
    Klimatic II Synthetic sleeping bag
    Original price £154.95 Price from £131.71
    4,5 (2)
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    Sierra Designs
    Frontcountry Bed 20 Synthetic sleeping bag
    Original price £227.95 Price from £193.76
    5,0 (2)
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    Carinthia
    Defence 1 Top Synthetic sleeping bag
    Price from £133.95
    4,8 (5)
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    Carinthia
    Survival One Synthetic sleeping bag
    Price £319.95
    5,0 (1)
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    Carinthia
    XP Top Synthetic sleeping bag
    Price £184.95
    5,0 (1)
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    15%
    Ajungilak
    Aputi Fiber Bag -7C Synthetic sleeping bag
    Original price £214.95 Price £182.71
    4,3 (3)
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    Carinthia
    G 490X Synthetic sleeping bag
    Price from £368.95
    5,0 (3)
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    Carinthia
    G 200Q Synthetic sleeping bag
    Price £154.95
    4,7 (6)
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    Carinthia
    Defence 4 Synthetic sleeping bag
    Price from £202.95
    4,7 (14)
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    Carinthia
    Tropen Synthetic sleeping bag
    Price from £145.95
    4,9 (7)
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    Carinthia
    Eagle Synthetic sleeping bag
    Price £119.95
    5,0 (1)
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    15%
    Grand Canyon
    Fairbanks 190 Synthetic sleeping bag
    Original price £59.95 Price £50.96
    4,5 (2)
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    Vaude
    Navajo 900 II SYN Synthetic sleeping bag
    Original price £119.95 Price £101.96
    5,0 (1)
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    15%
    Vaude
    Sioux 800 S II SYN Synthetic sleeping bag
    Original price £94.95 Price £80.71
    4,7 (3)
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    Deuter
    Dreamlite Synthetic sleeping bag
    Original price £81.95 Price from £69.66
    4,8 (8)
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    Big Agnes
    Anthracite 30 Synthetic sleeping bag
    Original price £145.95 Price £124.06
    5,0 (1)
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    Cocoon
    Mountain Wanderer Synthetic sleeping bag
    Original price £81.95 Price from £69.66
    5,0 (2)
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    Exped
    Deepsleep 0° C Synthetic sleeping bag
    Original price £102.95 Price £87.51
    5,0 (1)
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    Vaude
    Sioux 100 II SYN Synthetic sleeping bag
    Original price £76.95 Price £65.41
    5,0 (1)
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    Grand Canyon
    Utah 190 Synthetic sleeping bag
    Original price £63.95 Price £54.36
    5,0 (1)
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    Vaude
    Navajo 500 II SYN Synthetic sleeping bag
    Original price £102.95 Price £87.51
    5,0 (1)
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    20%
    Mammut
    Women's Perform Fiber Bag -10C Synthetic sleeping bag
    Original price £219.95 Price £175.96
    4,5 (2)
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    43%
    Sea to Summit
    Women's Quest QuII Synthetic sleeping bag
    Original price £179.95 Price £102.57
    4,5 (6)
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    Outwell
    Campion Black Synthetic sleeping bag
    Price £35.10
    5,0 (1)
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    15%
    Sea to Summit
    Boab -1°C Synthetic Sleeping Bag Synthetic sleeping bag
    Original price £119.95 Price from £101.96
    5,0 (1)
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    Sea to Summit
    Hamelin -9°C Synthetic Sleeping Bag Synthetic sleeping bag
    Original price £179.95 Price from £152.96
    5,0 (2)
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    Alvivo
    Arctic Extrem 200/225 Synthetic sleeping bag
    Original price £128.95 Price £109.61
    4,0 (1)
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    Robens
    Gully 600 -5°C Down sleeping bag
    Original price £159.95 Price £135.96
    5,0 (1)
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    Marmot
    Kid's Trestles Elite Eco 30 Synthetic sleeping bag
    Original price £139.95 Price £118.96
    4,0 (1)
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    15%
    Salewa
    Rozes Light Synthetic sleeping bag
    Original price £219.95 Price £186.96
    3,5 (2)
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    Snugpak
    Sleeper Lite Synthetic sleeping bag
    Price £70.95
    4,0 (1)
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    48%
    Stoic
    RovenSt. 5°C Synthetic sleeping bag
    Original price £145.95 Price from £75.89
    4,0 (4)
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    15%
    Mountain Equipment
    Lunar II Synthetic sleeping bag
    Original price £128.95 Price £109.61
    3,5 (2)
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    Mountain Equipment
    Lunar III Synthetic sleeping bag
    Original price £136.95 Price from £116.41
    4,0 (1)
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    Mountain Equipment
    Lunar I Synthetic sleeping bag
    Original price £102.95 Price from £87.51
    4,3 (3)
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    40%
    Vaude
    Maderno 600 Rect Synthetic sleeping bag
    Original price £85.95 Price £51.57
    4,0 (1)
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    35%
    Carinthia
    TSS System Synthetic sleeping bag
    Original price £463.95 Price £301.57
    4,0 (4)
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    45%
    Stoic
    TorsboSt. II Blanket Blanket
    Original price £85.95 Price £47.27
    3,3 (3)
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    15%
    Vaude
    Selun 800 SYN Synthetic sleeping bag
    Original price £188.95 Price £160.61
    4,0 (1)
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    15%
    Big Agnes
    Dream Island 20 Synthetic sleeping bag
    Original price £257.95 Price £219.26
    4,0 (1)
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    15%
    Vango
    Nitestar Alpha 250 Synthetic sleeping bag
    Original price £55.95 Price £47.56
    4,0 (4)
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    Vango
    Nitestar Alpha 250S Synthetic sleeping bag
    Original price £55.95 Price £47.56
    4,0 (1)
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    50%
    Mountain Equipment
    Women's Lunar III Synthetic sleeping bag
    Original price £145.95 Price £72.98
    5,0 (1)
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    15%
    Robens
    Gully 900 -10°C Down sleeping bag
    Original price £189.95 Price £161.46
    4,0 (1)
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    15%
    Salewa
    Micro II 850 Quattro Synthetic sleeping bag
    Original price £109.95 Price £93.46
    3,0 (3)
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    Carinthia
    Wilderness Synthetic sleeping bag
    Price £291.95
    3,0 (2)
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    15%
    Deuter
    Kid's Overnite Kids' sleeping bag
    Original price £102.95 Price £87.51
    3,0 (2)
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    15%
    Deuter
    Orbit -5°C Synthetic sleeping bag
    Original price £111.95 Price £95.16
    3,0 (1)
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    15%
    Sea to Summit
    Women's Hamelin -9°C Synthetic Sleeping Bag Synthetic sleeping bag
    Original price £179.95 Price from £152.96
    3,0 (1)
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    50%
    Nemo
    Jazz Synthetic sleeping bag
    Original price £289.95 Price £144.98
    4,0 (1)
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    5%
    Rab
    Solar Ultra 3 Synthetic sleeping bag
    Original price £254.95 Price from £242.20
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    15%
    Vaude
    Navajo 500 XL II SYN Synthetic sleeping bag
    Original price £111.95 Price £95.16
    1,0 (1)
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    Marmot
    Trestles Elite Eco 0 Synthetic sleeping bag
    Price from £249.95
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    Grüezi Bag
    Schlafsackwarmer Travel sleeping bag
    Price £59.95
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    Grüezi Bag
    Biopod Wolle Zero XL Synthetic sleeping bag
    Price £269.95
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    25%
    Ajungilak
    Women's Aputi Fiber Bag -10C Synthetic sleeping bag
    Original price £214.95 Price £161.21
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  • Check out our Buyers Guide!
    Looking for synthetic sleeping bags? Check out our Buyers Guide!

Down is not your only choice: synthetic sleeping bags

Synthetic Sleeping Bags

If you don’t want to carry a bivvy bag with you or you'll travel in areas with rapidly changing weather conditions, then it's better to opt for a synthetic rather than a down sleeping bag. Keep on reading to learn more about what to consider when buying a synthetic sleeping bag.

What kind of fill is found in a synthetic sleeping bag?

Synthetic fibre can be thought of as a giant wad of cotton. The lining is made up of tiny micro-threads that twist thousands of times to insulate warm air in the spaces between them. If the fibres themselves also trap air to improve heat retention, then these are called hollow fibres.
Synthetic fibres attempt to imitate down, which has certain advantages and disadvantages compared to the natural fibres. A synthetic sleeping bag can keep you toasty even if it gets wet, and it won't clump together. Synthetic fibres can’t loose any fill because they form a continuous filament. However they’re nowhere near as warm as down (when comparing two sleeping bags that weigh the same) and they're less vapour permeable.
Another thing to keep in mind is the price: if you want a sleeping bag for all occasions and you’re not concerned about weight or pack size, then get a synthetic one!

Where and when to use synthetic sleeping bags

Synthetic sleeping bags are mainly used in changeable weather conditions, e.g., in humid tropical climates or in cold, damp weather. You can also use them if you’d like to spend the night outdoors without a bivvy bag. In addition, even if the synthetic sleeping bag gets wet, it’ll still keep you toasty warm. Down tends to clump together when wet and therefore loses its ability to insulate.

The construction, types and features of synthetic sleeping bags

There are synthetic sleeping bags that come as a blanket and some as a mummy style. The former provides more comfort, while the latter provides more heat retention. In addition to connectable models, there are also women-specific sleeping bags on the market that feature a soft lining and have more insulation at the feet. Some other features to look out for are a draught collar, which is super practical in cooler temperatures and a two-way zip that provides more ventilation. Synthetic sleeping bags with L-shaped or U-shaped zips are even more versatile.
Of course, having only a synthetic sleeping bag doesn't guarantee a comfortable night's sleep. You'll also need to find a good sleeping mat. This combination will help you recharge your batteries for the next day of adventuring.

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