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Trek 900, 32°F Feather/Down Camping Mummy Sleeping Bag
Sleeping bag 32°F in feather (down, 800 cuins): high-end. 2.1 lbs in size L: warm, light, compact. Mummy shape, yet comfortable. Ergonomic hood. Zipper with double slider. Water-repellent.
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San Francisco, 735 Market St. Options
Select an available color and size to see options.
Product Features

Optimal temperature
Comfort temperature 32°F/0°C, limit temperature 23°F/-5°C
Easy to transport
2.1 lbs in size L. 7.8 liter volume. 2 bags: stuff bag and storage bag.
Sleeping comfort
Comfortable mummy shape, ergonomic hood. Long zipper with double pull.
Water repellent
Water-repellent fabric to optimize the thermal performance of your sleeping bag.
Warmth
RDS ethical down and feathers with a fill power of 800 CUIN.
Compatibility
non-twinnable sleeping bag
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Product Customer Reviews

So warm , very good quality, we camp a lot and this sleeping bag is the best that i never had. Lightweight and packs small, cozy and comfortable.
The bag seems to be well made with good quality material. I still have to try it when I go camping in the fall. But I have one big issue with the compression sac, why is it so dam small, it’s a real struggle to squeeze the bag in, rolled or stuffed. You could have made it 2-3 inches wider for easy stuffing . I will definitely have to buy a replacement compression sac from Sea to Summit to make my life easier. I would recommend the sleeping bag but I am disappointed with the poor thought put into designing of the compression sac.
Hello JIm,
Thank you for taking the time to leave a review. We are sorry that the product did not fit you perfectly.
Although we try to accommodate our design and size guides, our customers always advise taking one size up compared to your regular size.
Do not hesitate to ask our advisors for advice if you have any doubt about the product you need. Please be assured that we are doing our best to adapt our offer and make the size selection easier for all our customers.
Thanks & Regards,
Decathlon Brampton Team
Great 3 season sleeping bag. I am 5’10”, Uk size L and bought the L bag. Feels snug without being restrictive. Have used throughout the summer unzipped and is warm enough for the cooler seasons (down to low single figures). Material feels soft on the skin and the down lifts up nicely. Comes with a compression sack and a mesh storage bag. Excellent product for the money!
Nice
Lightweight and really really warm!
I had experience using this bag in temperatures close to 0C in the UK (May) alone in a 2 man tent. It comprehensively failed to provide anything like adequate warmth in these conditions. It packs up really small and the provision of both compression sack and a large storage bag work well. The loft is impressive when you get it out of the bag. The main problem is that it has nothing like sufficient filling to provide adequate insulation at the claimed 0C. Using this in 2 season conditions (certainly no less than 8C) it would probably be fine (but strikes me as expensive for what it is). Anyone considering using this in anything like 'survival' conditions would be well advised to give it a tame test in a campsite first - I would not trust it and will be returning mine.
Lightweight and packs small. I have used the bag down to -2 degrees and it was very snug. It is also not too how in warmer times. I used it in September on a wild camping cycling trip (on my Btwin Mountain bike) The nights were quite warm but I was fine.
Top quality Down filled sleeping bag.Comes with a separate storage airing bag for the Down to plump up whilst in storage.Smart stuff sacvfor when you are travelling.
I’ve used this sleeping bag for wild camps and camping. It’s so light but cosy and comfortable to give a good nights sleep. Easy to pack away he comes with a bag to store away when not in use. A great product for the price and with a sleeping bag liner could be used in much colder seasons.
Excellent product
I like the product. Plus its very compact.
Да, използвах го на 2⁰ С в планината при доста влажни условия и мога само суперлативи да споделя. Топъл, лек и компактен :)
Здравейте,
Благодарим Ви за отделеното време и оценката, която сте дали за нашия продукт.
Качественото обслужване, доволните клиенти и предоставянето на възможността всички да спортуват е наша главна цел.
Спортни поздрави,
Екипът на Декатлон Българи!
Лек, удобен, много комфортен. С термобельо при външна температура от 0 градуса не се чувства студ.
Здравейте, Борис,
Благодарим Ви за отделеното време и оценката, която сте дали за нашия продукт. Качественото обслужване, доволните клиенти и предоставянето на възможността всички да спортуват е наша главна цел.
Спортни поздрави,
Екипът на Декатлон България!
Velice doporučuji péřový spací pytel:) (MT 900 0° Forclaz) skvělá střední cena a krásně hřeje i v horších podmínkách
Opravdu velmi dobrý spacák, malý po sbalení, lehký a při tom velmi teplý. Při nočních teplotách kolem 6°C jsem spal v částečně rozepnutém spacáku (u nohou i nahoře), jinak jsem se potil.
Additional Product Information
Composition
Filling
- 10% Grey duck feather
- 90% Grey duck down
Lining
- 100% Polyamide
Main fabric
- 100% Polyamide
Carry bag
- 15% Polyurethane
- 85% Polyester cationic
bag cover
- 100% Polyester cationic
Temperature of use:
All our sleeping bags display the temperature ratings, tested by an independent laboratory (AITEX), in accordance with the European standard NF ISO 23537 - 2017. The "comfort temperature" is the lower comfort limit at which a user in relaxed position is in overall thermal balance and is neither hot nor cold (determined for an average woman in normal conditions of use). Choose your sleeping bag according to this criterion.
What are the limit temperatures for usage?
Limit temperature: temperature limit at which the user of the sleeping bag in huddled-up position is generally in thermal equilibrium and is neither cold nor hot (determined for a standard man under normal conditions of use). We recommend using an insulation mattress to optimize your thermal comfort. This sleeping bag is filled with feathers and down. The thermal insulation may drop in damp conditions.
However, this is what you need to know about temperatures:
A sleeping bag does not produce heat but retains the heat produced by the body. If you are tired and cold and you slip inside a cold, damp sleeping bag, it is very likely that you will feel cold no matter how good your sleeping bag is! These temperatures therefore depend on the person's resistance to cold (bulk, fatigue, etc.), equipment (mattress with insulation, etc.), clothing (naked, underwear, etc.), and weather conditions (humidity, wind, etc.).
For greater comfort, before getting into your sleeping bag:
Dress simply (1 layer of clothing is enough) Warm up your extremities: Use hats, gloves, socks, bed warmers, rubbing, etc. A flask filled with hot water can be used as a foot or bed warmer (so long as there's no chance of it opening by accident!) Contract your muscles (70% of the energy consumed is converted into heat) but without making any movement generating a cold airstream. Use a silk or thermal sleeping bag liner to maximize warmth and hygiene inside your bag.
Shape:
The mummy shape optimizes thermal insulation (no loss of heat because there is not much air flow or drafts) and saves space, which means that your movements are restricted. Width at the shoulders 28.3", height at the feet 10.2" in size L. Ergonomic hood with drawstring. Double slider, lined with an anti-cold duvet flap, side opening. H-shaped compartment structure to reduce thermal bridges.
Weight and dimensions:
Size S 1.7 lbs, user height: up to 5'3". Bag dimensions: Ø 5.9" x 13.4". 6.1 liter volume. Weight 13.4 oz down. Size M 1.9 lbs, user height: 5'3" to 5'7". Bag dimensions: Ø 6.3" x 13.4". 6.9 liter volume. Weight 15.5 oz down. Size L 2.2 lbs, user from 5'7" to 6' tall. Bag dimensions: Ø 6.7" x 13.4". 7.8 liter volume. Weight 1.1 lbs down. Size XL 2.3 lbs, user between 6'1" and 6'7" tall. Bag dimensions: Ø 7.1" x 13.4". 8.7 liter volume. Weight 1.2 lbs down.
Size and thermal insulation:
Try your sleeping bag before buying it to choose the right size for your comfort. Ideally, you should not be pressed up against the fabric, at the feet or head, and the fabric should not be taut. This would create thermal bridges that lower the insulation of your sleeping bag. Conversely, a sleeping bag that is too big will be harder to heat up and will not be as good at insulating the heat generated by the body.
Size and thermal insulation (continued):
The weight, volumes, and sizes may vary slightly owing to production tolerances. Volume and dimensions in the bag may vary according to the compression applied to the product.
Origin of feathers and rds certification:
Our traceability system lets us guarantee the origin of the feathers in accordance with our commitment to use responsible materials. Our suppliers are committed to using only feathers that come from ducks (Chinese origin) that are bred for their meat and are plucked after slaughtering. We have been awarded RDS certification (Responsible Down Standard) by a 3rd-party organization. http://sustainability.decathlon.com/media-reports/
The advantages of a duck down and feather fill:
The fill power of down has 3 advantages for mountain sports: - Thermal insulation provided by the air trapped in the down and feathers - Ultra low weight: Down is lighter than synthetic fill while offering the same degree of warmth. This saves even more weight in your backpack - Ultra-compressible
How to measure the fill power of a down and feather fill?
The fill power is a measure of the down's thermal insulation capacity and its potential to "trap" air. It is expressed in CUIN (cubic inches). So, down with a higher fill power (higher CUIN number) will occupy more space, trap more air, and provide greater thermal insulation. 90% duck down, 10% duck feathers. Filling Power of the down: 800 CUIN (IDFB standard) The feather filling requires special care. Follow care advice.
Care instructions
Machine wash on a delicate cycle at 86°F, wash inside out, with 3 or 4 washing balls (or clean used tennis balls). Use a detergent for feathers and down. Rinse multiple times. Spin dry on a slow and gentle cycle. Required step: Tumble dry on low heat on a delicate cycle. Finish off drying outside, ideally in the sun, on both sides to prevent the down from forming clumps. Dry thoroughly before storing.
Eco-design
We chose to use a so-called "biton" thread for all the gray-colored fabrics in this sleeping bag. Textile dyeing requires a lot of water but also produces waste water from the dye baths. To reduce this impact on the environment, we chose to use a dyeing process called "bi-ton," which involves dyeing 1 in every 2 yarns. This dyed yarn is also made from a bulk dyeing process that incorporates the color pigments from the yarn manufacturing phase onward.
Warranty:
We have chosen to use a "biton" yarn in the sleeping bag lining (gray). Textile dyeing requires a lot of water but also produces waste water from the dye baths. To reduce this impact on the environment, we chose to use a dyeing process called "bi-ton," which involves dyeing 1 in every 2 yarns. This dyed yarn is also dyed using mass pigmentation, using color pigments when the yarn is manufactured.
Origin
Imported
Product testing
Size and height of the user: S < 5'3" < M < 5'7" < L < 6'1" < XL < 6'7"
Storage instructions
To maintain its fill power, which is necessary for its insulation properties, store your sleeping bag by stuffing it in the mesh bag provided, feet first. Can be stored flat.
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Trek 900, 32°F Feather/Down Camping Mummy Sleeping Bag
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Heavy products return policy
If you return a product you will receive a refund for the purchase price plus any applicable sales taxes, less any non-refundable charges.
Decathlon will cover all shipping costs associated with your return except for items excluded from our return policy such as bikes, basketball hoops, snowboards, surfboards, tents, and other larger / heavier items.
Return costs for heavy products:
Weight Thresholds | Shipping within California | Shipping outside of California |
---|---|---|
> 9 lbs | $20.00 | $25.00 |
> 30 lbs | $50.00 | $65.00 |
> 100 lbs | $100.00 | $125.00 |
> 200 lbs | $200.00 | $230.00 |
If you return a product at any of our store locations, we will gladly help you find the best alternative product or refund you on the spot.