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Trekking Sleeping Bag MT500 5 degrees Celcius - Polyester

Sale price: $40.00 Regular price: $69.99

Well protected by its anatomical hood that can be adjusted with a drawstring, you will appreciate the comfortable width at the shoulders. Ventilation provided by the 2 double-slider zips.

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Sale price: $40.00 Regular price: $69.99

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About this item:

  • Comfort Temperature: 41°F/5°C I Temperature Limit 32°F/0°C I Synthetic padding
  • Size L Weight: 2.6 lbs (1200 g) I Volume: 11.3 L I Stuff Bag
  • Comfortable mummy shape. 2 x 3/4 zips with a double slider for ventilation.
  • Water repellent: Outer surface of the fabric is treated
Model: 8618869

Product Videos

Product Features

A photo of the Trekking Sleeping Bag MT500 5 degrees Celcius - Polyester in use

Trekking Sleeping Bag MT500 5 degrees Celcius - Polyester | This sleeping bag was designed by our trekker-designers for bivouacking comfortably at night at temperatures greater than or equal to 5°C.

Well protected by its anatomical hood that can be adjusted with a drawstring, you will appreciate the comfortable width at the shoulders. Ventilation provided by the 2 double-slider zips.

Optimal temperature

Temperature rating 5°C, temperature limit 0°C. Synthetic padding

Easy to transport

For size L. Weight: 1200g. Volume: 11,3 litres. Stuff Bag

Sleeping comfort

Very comfortable mummy shape. 2 x 3/4 zips with a two-way cursor for ventilation


Can be twinned with other models from the Forclaz MT500 range

Water repellent

Outer surface of the fabric is treated so that water runs off the surface

Questions & Answers

Product Customer Reviews

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714 Reviews
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Trekking Sleeping Bag MT500 5 degrees Celcius - Polyester,deep chocolate truffle
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Sleeping bag

Used it in late summer and was perfect. Fits easily in my bike bag

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Sleeping bag.

The sleeping bag is a good bag but not perfect. I'm happy with that anyway ☺️ Thank you 😊

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nice and cosy

as above

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Great sleeping bag for winter in HK

Purchased for my wife to replace a 15 degree bag and this is way warmer and packs down to a smaller footprint as well. Good quality materials and kept her warm to below 8 degrees without feeling stuffy or claustrophobic. I will be getting another one for myself and will test the ability to zip together.

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Hi Tim,

Thank you for supporting Decathlon Hong Kong and your feedback on your experience with our product!

We sincerely appreciate your insight! It's also our pleasure to ensure you have the best experience with our products! 

We can't wait to offer you more and better products in order to delight your sports experiences! 

If you have any more questions, comments, please feel welcome to reach back out as we would be more than happy to share and assist. Hope to see you around soon!

Stay healthy!

Icy Chan

Decathlon Hong Kong Hiking & Trekking Team

Sleeping bag

Very comfortable and warm

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It's my favourite sleeping bag now. It's so comfortable that I feel like abandoning my bed and just sleeping in the bag permanently.


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Little costly but nice product

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Super product

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Top Quality Material with good Price! Recomanded!

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Width of the product is very less

Hi Manish

Thanks a lot for investing your time in reviewing our product. We are sorry that we were unable to provide you with your expectation. We do have the availability of two different sizes, that are L-large and Xl-extra large. If the product is not used, you can exchange it for a bigger size from the nearest store which has the available stock. You can even exchange the product to get back a full money refund if the products are not used to help you to purchase a bigger size.

Feel free to write back to me with any concerns or issues, I will be available to help you with you r concerns.


It wont keep you warm. Around 8degree celcius i was shivering specially from lower body side. Not worth money. High cost still wont help you

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Hi Agrima

We appreciate the review that has been submitted by you detailing your experience and we are sorry that the product didn't work according to your need or expectation.

If the product has not been helpful to you, we can look into an alternative resolution that supports your needs. (Kindly send me the date of purchase and store from which it was bought)

But FYI- All our products are tested by a group of professional trekkers and are reviewed for temperature and other factors. with respect to the user experience and we recommend products for other similar users. EOD, level of adaptation, and levels of tolerance to cold or warm climates differ from one person to other.

I believe this is one of the instances. Kindly write back to me so that we can look into it in detail and provide a better resolution.

High quality

Worth its price. Also small in size which is useful during travelling

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Nice product

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Additional Product Information


Padding: 100.0% Polyester ; Main fabric: 100.0% Polyester ; Carry bag: 100.0% Polyester ; Lining: 100.0% Polyester

What is the temperature rating?

We display the comfort temperatures on all our sleeping bags, tested by an independent laboratory (AITEX) in compliance with European standard ISO 23537-1:2022. The comfort temperature rating is the lower limit at which the user in relaxed posture is generally in thermal equilibrium and feels neither too cold nor too hot (for a standard woman in normal conditions of use). Choose your sleeping bag according to this criterion.

What is the temperature rating (lower limit at which you feel comfortable)?

The comfort limit temperature is the temperature limit at which a person curled up in the sleeping bag is in general thermal equilibrium, neither too cold nor too hot (determined for a man in normal conditions of use).We recommend using an insulation mattress to optimise your thermal comfort.

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 by using a less insulating mattress, the thermal performance of your sleeping bag will be lower.We therefore recommend you use an insulating mattress to optimise your thermal comfort.

Some advice to consider before you get into your bag

Dress simply (1 layer of clothing is enough). Warm-up your extremities: hats, gloves, socks, hand/feet warmers, rubdowns, etc. A flask of hot water can be used as a hot water bottle (as long as there's no chance of it accidentally opening!) Contract your muscles (70% of the energy consumed is converted into heat) but do it without moving as this could create a draught. Use a bag liner to optimise warmth and avoid washing your sleeping bag too frequently.


A generous mummy shape that is wide at the shoulders and narrow at the feet to optimise thermal insulation (no heat loss) and make the product more compact, while maintaining some freedom of movement.Width at the shoulders 70 cm, height at the feet 32 cm in size L. 62/28 in S, 66/30 in M, 74/34 in XL.

Weight and dimensions

Size S: 980 g, user up to 1.59m tall. Bag dimensions: L 40 cm Ø 17 cm. Volume 9.1 L.Size M: 1100 g, user from 1.60m to 1.69m tall. Bag dim.: L 40 cm Ø 18 cm. Volume 10.2 L.Size L: 1200 g, user from 1.70m to 1.84m tall. Bag dim.: L 40 cm Ø 19 cm. Volume 11.3 L. Size XL: 1290 g, user from 1.85m to 2m tall. Bag dim.: L 40 cm Ø 20 cm. Volume 12.6 L.Volume & dimensions may vary according to the compression applied to the product.


Ergonomic hood with drawcord.A baffle along the zips prevents heat loss.Double-slider zips for optimal ventilation.The top of the sleeping bag can be opened with the two side zips.

Want to know more about the wadding?

We use 2 layers of overlapping wadding: - one is 60 g/sqm, 100% polyester (90% recycled),- and one is 115 g/sqm, 100% polyester (70% recycled).It retains its warmth even when wet.


Can be twinned with all the Forclaz MT500 sleeping bag models.Can be twinned with the older models in the 2017 ”Ultralight” and 2018 ”Light” ranges.

Product testing

All our sleeping bags undergo mechanical tests that test the performance and resistance of the sleeping bag to guarantee better sleep and recuperation (thermal resistance, resistance to abrasion, comfort, etc). We also carry out many tests in the field, in real conditions.

Storage instructions

You can easily store your bag by stuffing it loosely into its cover, feet section first. To keep it fluffed up & ensure good thermal performance, remove from its cover, extend, store it in a dry place.



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