Makalu III Light Sleeping Bag - Size L

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Key feature
Mummy shaped sleeping bag, hood offering good coverage, 3D structure to prevent thermal bridges, two-way zip opening lined with flap
Users reviews
4.31 / 5 16 ratings

Products benefits

Optimum temperature
Temperatures: Comfort temperature -12°C; Limit temperature -19°C; Extreme -42°C
Lightweight product thanks to down, with fill power = 800 CUIN (EU standard)
Compact design
Stuff sack volume: Size L = 27 L
User comfort
Silky fabric; 100% polyamide; hood; two-way zip, downy draft flap.


Filling : 90.0% Grey Duck Down, Filling : 10.0% Grey Duck Feather Lining : 100.0% Polyester Shell : 100.0% Polyamide Carry bag : 100.0% Polyamide Bag cover : 100.0% Polyester
Approved by
team SIMOND mountaineers on numerous expeditions: especially on Nuptse (Everest)
2 years


Storage Tips
Store your sleeping bag in its storage cover in a dry place because there is the risk of the down deteriorating if it is compressed for too long in its compression sack

Additional information

90% duck down, 10% feathers; Fill weight: 1,100 g in size L; Fill Power (loft power of down) : 800 Cuin (CE standard) * Our feathers come from Chinese ducks farmed for their meat. We retrieve their feathers after they are culled. We keep the ducks death certificates
Mummy shape: Shoulder width (80 cm in size L) and tapers down towards feet with room to move but prevent heat loss at feet (20 cm in size L). Anatomic hood shape and a drawcord Two-way front zip with downy draft flap to keep out the cold
Available sizes: L Size L: for people measuring 185 cm max Dimensions (cm) : L: 210x80 cm Weight (g): L = 1775 g Folded dimensions: Ø28 x L 49 cm Compressed stuff bag dimensions: Ø28 x L 44 cm
Temperature rating
We display on all our sleeping bags, the temperature ratings tested in an independent lab (AITEX) based on European Standard EN 13537 (2016). The "comfort temperature rating" is the lower limit when a user in the sleeping position is generally in thermal equilibrium and is neither hot or cold (based on a "standard" woman in normal conditions of use). Choose your sleeping bag based on this feature.
What you must know about temperature ratings
A sleeping bag does not generate heat, but "maintains" heat generated by body. If you are exhausted and cold and you slip in to your freezing and damp sleeping bag, you risk staying cold whatever the sleeping bag's features! These temperature ratings therefore depend on a person's resistance to the cold (build, fatigue, etc.), on their equipment (mattress that insulates from the ground, etc.), on their clothing (naked, underwear, etc.), and on weather conditions (damp, wind, etc.).
A rating for comparing products environmental impact
Product's environmental impacts are calculated throughout its life cycle and with different indicators. An overall score (ABCDE) is attributed to help you easily identify the products with the best environmental performance by comparing products of the same type with one another (T-shirts, trousers, backpacks, etc.). Decathlon chose to apply this voluntary environmental labelling scheme. To get more information:

Users reviews

4.31 / 5 16 ratings
14 users recommended this product
Distribution of ratings

At Decathlon, reviews are reliable.

  • Woman
    30-39 years old
    07 August 2020
    Use since 7 to 12 months
    That review has been deposited on this product version
    Washing process

    I would like to know how can I wash my Simond Makalu 3 at home.

  • Man
    20-29 years old
    18 September 2019
    Use since 1 week or less
    That review has been deposited on this product version
    Looks nice

    Will use in comming months...and update then ...fill weight shown on the manufacturer ( simond ) website is 1100 g for size XL but on decathalon the same fill weight is shown for size L , Correct fill weight for size L should be displayed since only size L is available on decathalon

    Brand response :

    Hi AP,

    Thank you for reaching out regarding your doubt about the Simond Makalu III down sleeping bag.

    You are right, there is a mismatch between and But fortunately the information on Indian website is correct. You can refer to for the same.

    I will reach out to the UK website team and get the information corrected.

    Once again thanks for highlighting.

    I hope you get to take the sleeping bag out soon. I recently used this bag on the base of Mount Yunam and was too hot in fact (temp were -10 to -12 at night). So yeah I can say you will have a nice cozy time during your expeditions. Just make sure you have a thick mattress underneath to increase ground insulation and a synthetic liner to increase the life of sleeping bag.

    All the best for your upcoming adventures!

    Regards, Ravindra Charan Product Trainer & Country Sport Leader- Climbing & Mountaineering

  • 18 December 2019
    Use since 2 to 8 weeks
    That review has been deposited on this product version

    Die Verarbeitung macht einen guten Eindruck, Material fühlt sich beim schlafen sehr gut an, das der Schlafsack nicht ganz geöffnet werden kann hab ich nur als kleinen Nachteil gesehen, da der Reißverschluss doch sehr weit aufgeht und man somit dir Wärme gut kontrollieren kann, der Vorteil ist natürlich das er die Wärme durch die Bauweise besser halten kann.
    Das Packmaß ist durch die Menge an Daunen entsprechend groß.
    Ich hatte ihn bei einer Außentemperatur um die -7 Grad in Verwendung, einmal im Zelt mit Isomatte direkt auf Schnee und einmal im unbeheizten Winderraum.
    Mit leichter bekleidung im Zelt war es zu Kalt, da die Isomatte der Kälte nicht standhielt, hier ist zu empfehlen mit mehreren Isomatten zu Arbeiten.
    Im Unbeheizten Winterraum in Unterwäsche, war es angenehm warm.
    Leider fehlen mir Vergleiche mit einem 800€ Schlafsack!