Makalu I Light Sleeping Bag - Size M

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Key feature
The lightest highly compressible sleeping bag in the SIMOND range, easy to transport and use with its mummy shaped bag, hood with good coverage, 3D assembly to prevent thermal bridges
Users reviews
3.68 / 5 34 ratings


Products benefits

Optimum temperature
Temperatures: Comfort temperature -5°C; Limit temperature -11°C; Extreme -31°C
Lightweight product thanks to down, with fill power = 800 CUIN (EU standard)
Compact design
Stuff sack volume: Size M = 10 L / size L = 11 L / size XL = 11.4 L
User comfort
Silky fabric; 100% polyamide; hood; two-way zip, downy draft flap.
Environmental impact
C Rating - Comparison: sleeping bag - technical details


Padding : 90.0% Grey duck down, Padding : 10.0% Grey duck feather Main fabric : 100.0% Polyamide Carry bag : 100.0% Polyester (PES)
Approved by
team SIMOND mountaineers on numerous expeditions: especially on Nuptse (Everest)
Designed to :
mountaineers or walkers looking for a lightweight and warm down sleeping bag for temperatures close to -5°C
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: 505 g in size M // 560 g in size L and 640 g in size XL; 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 in sizes : M // L // XL. Dimensions (cm): M: 200x78 cm / L: 210x80 cm / XL: 222x82 cm Weight (g): M=1070 g / L=1160 g / XL=1260 g Dimensions of folded stuff sack: M Ø 20.5 x 36 cm / L Ø21x37.5 cm / XL Ø21x39 cm Dimensions of compressed stuff sack: M Ø 20.5 x 31 cm / L Ø21x32 cm / XL Ø21x33 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

3.68 / 5 34 ratings
23 users recommended this product

At Decathlon, reviews are reliable.

  • Woman
    40-49 years old
    03 May 2019
    Use since 1 week or less
    That review has been deposited on this product version
    Peso incorrecto Talla L pesa 1,460 gramos.

    Según la pagina de Decathlon Peso (g): M=1070 g / L=1160 g / XL=1260 g
    El mio en talla L pesa 1460 g lo que representa un 25% mas de peso.
    El de mi mujer de la talla M pesa 1280 lo que representa un 20% mas de peso.
    Medido en peso electrónico. No parece un error aleatorio porque los dos que tengo pesan como mínimo un 20% mas. Mas bien parece publicidad engañosa.
    un saludo

    Brand response :

    Hola Zenaida

    Siento que no estés contenta con la info proporcionada por la marca. Me pondré en contacto con ellos para que resuelvan esta incidencia.
    Nuestro objetivo es siempre que tengas una información fiable de nuestros productos, entiendo que debe ser un error.

    Perdona por las molestias, sí el producto no es de tu agrado puedes llevarlo a la tienda más cercana para realizar su devolución.

    Un saludo.

    Miguel Angel
    Lider Escalada El Puerto de Santa Maria

  • Man
    40-49 years old
    23 January 2019
    Use since 2 to 8 weeks
    That review has been deposited on this product version

    Producto excelente de gran calidad. Muy muy caliente, creo que los rangos de temperatura que marca se corresponden bien a la realidad. Muy comodo. Ideal para los que como yo buscamos un saco compacto y ligero, de calidad, técnico y ajustado de precio. Muy recomendable.

  • Woman
    30-39 years old
    07 December 2018
    Use since 1 week or less
    That review has been deposited on this product version
    Todo okay

    Aún no lo probé pero es lo que buscaba