This mummy-shaped bag with a hood is designed for camping in temperatures of 5°C or more. We made this padded sleeping bag lighter and more compact to suit your needs. For easier use, it opens up along 3/4 of the length.
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Padding: 100.0% Polyester, Lining: 100.0% Polyamide, Main fabric: 100.0% Polyamide, Carry bag: 100.0% Polyamide
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To keep your sleeping bag fluffed up and to retain its thermal performance, it’s best to store it out of its bag.
Optimum temperature
Comfort rating: 5°C Lower limit: 0°C Synthetic wadding filling.
Lightweight
Size L. Weight: 1,050 g (37 oz.). Volume: 9.5 L (2.5 gal) Carrying bag.
Ease of use
3/4 length anti-pinch zipper.
Adjustable
Adjustable hood with elastic cord and drawstring.
Water repellent
Surface-treated outer fabric (PFC-free) that repels water.
Weight and dimensions of the MT 500 5°C Sleeping Bag
Size S (1.59 m/5’2” or less)900g (31.7oz.)Folded size: L: 35cm (14”). Dia.: 17cm (7”)Vol.: 7.5L (1.7gal) Size M (1.60 m/5’2”-1.69 m/5’5”): 950g (33.5oz.)Folded size: L: 35cm (14”). Dia.: 18cm (7”)Vol.: 8.5L (2.2gal) Size L (1.70m/5’6”-1.84 m/6’0”)1,050g (37oz.)Folded size: L: 35cm (14”). Dia.: 19cm (7.5”)Vol.: 9.5L (2.5gal) Size XL (1.85 m/6’0”-2 m/6’6”)1,110g (39oz.)Folded size: L: 35cm (14”). Dia.: 20cm (7.9”)Vol.: 10.5L (3.8gal) Dimensions can vary by 5% due to manufacturing tolerances.
Features of the MT 500 5°C Sleeping Bag
Ergonomic hood with a drawstring. Double collar prevents heat from escaping. A baffle along the zipper prevents heat loss. Double-slider zipper for breathability. Inside pocket.
How can I keep warm in the MT 500 5°C Sleeping Bag?
Dress lightly (1 layer of clothing, ideally made from merino wool). If needed, wear a hat, gloves, and socks, and use hand warmers. Use a sleeping bag liner to keep heat in. Avoid over-washing. Choose a mattress with good insulation (R-value >3). Tip: contract your muscles (70% of the energy consumed is converted into heat), but avoid moving as this can create a draft.
How to repair the MT 500 5°C Sleeping Bag
Your sleeping bag may tear on a hike. It happens! The good news is that it can be repaired. To do this, we recommend self-adhesive repair patches (ref: 8584596). If you don’t feel comfortable doing this yourself, a heat-bonded patching service is available at the workshop of your Decathlon store.
Do you want to know more about the wadding?
We use 3 overlapping layers of 60 g/m2, 100% polyester wadding for the top and bottom of the sleeping bag. The wadding is made from silicone-coated spiral fibres that are highly compressible and durable. The trapped air makes the filling highly insulating and lightweight. It stays warm even when wet.
How durable is fabric of the MT 500 5°C Sleeping Bag?
On the outside, the fabric is 100% polyamide, 38 g/m² fabric weight, 20 denier. This fabric can withstand up to 20,000 abrasion cycles. Durability is calculated using the Martindale test according to ISO standard 12947-2. This test involves rubbing the bag’s material against another material to assess its abrasion resistance. The inner lining is made from a 100% polyamide, 20-denier fabric weighing 35 g/m2.
What is the comfort rating?
All our sleeping bags display the temperature ratings and are tested by an independent lab (AITEX), in accordance with ISO 23537-1 standard. The comfort temperature is the lower limit at which the user is in general thermal equilibrium, feeling neither too cold nor too hot (for an average person in normal conditions). Use this rating to choose the right sleeping bag for you.
What is the lower temperature limit?
The comfort temperature is the lower limit at which the user is in general thermal equilibrium, neither too cold nor too hot (for an average person in normal conditions of use).
An important clarification concerning the ISO 23537-1 standard
In the context of this standard, the measurement protocol of a sleeping bag’s thermal protection uses a mattress with thermal resistance equal to an R-value of 4.8. This means that when using a less insulating mattress, the thermal performance of your sleeping bag will be lower. Use an insulating mattress to optimize your thermal comfort.
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87% [translation_statistics-rating-breakdown-customers-recommend]
Thu, May 22, 2025
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: 8 to 12 months
: en_GB
The description says it's good down to 5C. If you combine it with a liner, a blanket and keep your clothes on you might stay warm. Probably good for about 15C. The material is incredibly slippy so you'll slide off your mattress all night.
Value for money | 2 | |
Ease of use | 4 | |
Lightweight | 5 | |
Optimum temperature | 1 |
Tue, May 13, 2025
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: 3 to 8 weeks
: en_GB
Brilliant bag that keeps you warm even old cold nights, without the need to layer up inside. Packs down well and is very lightweight for what it does
Optimum temperature | 5 | |
Lightweight | 4 | |
Ease of use | 5 | |
Value for money | 4 | |
Look / Design | 5 |
Mon, Mar 24, 2025
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: 2 week or less
: en_GB
My son was delighted with this sleeping bag. It was great for us to be able to compare the different options in store and for stock to be available to buy on the day.
Value for money | 5 | |
Lightweight | 5 | |
Ease of use | 5 |
Hi,Thank you for the 5* product review! We’re thrilled to hear that you’re happy with your purchase.We appreciate the time you have taken to review this product and that you have shared your good experience to help others make a purchase. We hope to see you back soon. Kind reg
ards, Dean
...Mon, Jan 06, 2025
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: 2 week or less
: en_GB
I got this back for my son. we have yet to use it but it is a perfect fit for him. I did plenty of homework before buying it and for the money, warmth factor and weight it is a reasonable purchase
Value for money | 5 | |
Lightweight | 5 | |
Ease of use | 5 |
Hi,Thank you for the 5* product review! We’re thrilled to hear that you’re happy with your purchase.We appreciate the time you have taken to review this product and that you have shared your good experience to help others make a purchase. We hope to see you back soon. Thank yo
u, Dean
...Mon, Jun 02, 2025
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: 3 to 8 weeks
: fr_FR
C’était un cadeau il a été très apprécié!
Lightweight | 5 | |
Ease of use | 5 | |
Value for money | 4 | |
Look / Design | 4 | |
Optimum temperature | 4 |
Sun, Jun 01, 2025
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: 3 to 8 weeks
: fr_FR
Bien pour le printemps été automne.
Optimum temperature | 4 | |
Lightweight | 4 | |
Ease of use | 3 | |
Value for money | 4 | |
Look / Design | 5 |
Sun, Jun 01, 2025
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: 3 to 8 weeks
: fr_FR
difficile à ranger dans le sac, mais une fois que l'on m'a expliqué qu il fallait l'enfoncer dans la pochette, tout est devenu simple. Pas assez chaud pour les nuits dans le desert marocain en février.
Optimum temperature | 3 | |
Lightweight | 5 | |
Ease of use | 5 | |
Value for money | 5 | |
Look / Design | 5 |
Sun, Jun 01, 2025
: 3 to 8 weeks
: fr_FR
Système anti coincement du zip a revoir. La doublure peut se faire pincer dedans malgré le système anti coincement
Lightweight | 3 | |
Value for money | 3 | |
Ease of use | 3 | |
Optimum temperature | 4 | |
Look / Design | 4 |
Sun, Jun 01, 2025
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: 3 to 8 weeks
: fr_FR
A 5° il est un peu juste
Optimum temperature | 4 | |
Lightweight | 5 | |
Ease of use | 5 | |
Value for money | 4 | |
Look / Design | 5 |
Sat, May 31, 2025
: 2 week or less
: fr_FR
J'ai essayé ce duvet début du mois de mai sur 2 trekks de 2 jours, Soit donc 2 nuits avec un intervalle de 10 jours entre ces 2 trekks ( chaque rando 15-20km). L'intervalle de ces 2 trekks m'ont permis de bien prendre du recul sur ce produit. Nuits passée à 1000m avec une temp
érature extérieur avoisinant les 0 degré la nuit non venteux. Le duvet dans sa version L est léger, son poids dépassant à peine 1kg est apprécié et son sac de compression lui permet de réduire sa taille quasi de moitié par rapport à son volume de 9L de base. Se range facilement dans la poche du bas de mon sac mt100 easyfit à laquelle j'ai pu rajouter un matelas MT500 L ( le air isolant orange ) ainsi qu'une serviette microfibre et un coussin gonflant. Afin que le duvet reprenne son gonflant, ne pas hésiter à le déplier 30 min avant de se coucher. Passons à l'utilisation et son ressentis. Je décide de dormir avec un sweat. Le duvet est agréable, doux, satiné. La taille en longueur est bonne pour moi. Les pieds ne sont pas compressé mais cela se complique aux hanches et épaules. Je mesure 1m75 mais j'ai les épaules assez large ce qui a été contraignant pour plusieurs points. Premièrement, difficultés de remonter la fermeture éclair, en effet la largeur du duvet aux épaules étant serré pour ma part il m'a été difficile de bien remonté la fermeture, pas impossible mais compliqué.. Deuxièmement, au vu de la difficulté de remonté la fermeture éclair, il est vrais qu'elle s'est prise plusieurs fois dans le boudin de doublure, facilement déblocable mais embêtant quand ça arrive, troisièmement le fait que ce soit serré au niveaux de mes épaules, je ne pouvais pas aplanir le haut de mon corps correctement sur le matelas, en gros le dos était plat mais je tanguais d'une épaule à l'autre pour essayer de trouver du confort pour dormir et quand à essayé de se tourner dans le sac impossible, vous êtes vraiment emmitoufler, limite oppressant. Encore une fois cela me concerne au vu de mes larges épaules. Et pour les dernier mauvais point le duvet est un peu bruyant et aura tendance à glisser sur le matelas et ce même si le matelas MT500 air isolant possède des patch antidérapant (surtout si vous bougez la nuit). Le duvet possède néanmoins une bonne isolation thermique, ma première nuit j'avais un sweat et ma deuxième nuit en tee shirt en rajoutant un drap de soie MT500, le confort thermique était parfait. Le duvet possède une capuche que l'on peut ajuster afin que celle ci englobe notre tête et ne laisse passer que le nez et la bouche, je fais en sorte que mes yeux soit recouvert pour ne pas être déranger des premiers rayon de soleil du matin. Pour finir les materiaux sont agréables mais je décide de passer sous sa forme XL (mais en confort 0 cette fois ci) qui est mieux adapté pour moi. Je perds du litrage dans le sac mais il rentre dans ma poche du bas du sac mt100 easyfit en forçant un peu, celui ci étant mieux adaptés à mes épaules est + agréable. Merci à Decathlon Geispolsheim (67)
...Optimum temperature | 5 | |
Lightweight | 5 | |
Ease of use | 3 | |
Value for money | 5 | |
Look / Design | 5 |