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Trekking Sleeping Bag MT500 5 degrees Celcius - Polyester
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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San Francisco, 735 Market St. Options
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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
Product Videos
Product Features

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
Compatibility
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
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Product Customer Reviews

Used it in late summer and was perfect. Fits easily in my bike bag
The sleeping bag is a good bag but not perfect. I'm happy with that anyway ☺️ Thank you 😊
as above
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.
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
Very comfortable and warm
NICE PRODUCT, IT'S REALLY WARM.
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.
Excellent
Little costly but nice product
Super product
Top Quality Material with good Price! Recomanded!
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.
Agneyan
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
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.
Agneyan
Worth its price. Also small in size which is useful during travelling
Nice product
Additional Product Information
Composition
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.
Style
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.
Functions
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.
Compatibility
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.
Origin
Imported
Superior quality. Unbeatable prices.
For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.
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