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Backpacking Sleeping Bag MT500 41°F - 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.
This product runs small
Free shipping over $49
Free returns
Free pickup
San Francisco, 735 Market St. Options
Select an available color and size to see options.
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 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

Good buy, worth the price
Unfortunately I'm not a fan of the sarcophagus shape. It serves the feet so you have to open it from the bottom to take out at least one foot and have more range of movement. Who sleeps straight and still? In addition, the assembly with my husband's is not as practical as the rectangular shape. We are side by side but each stuck in our sleeping bag. Temperature level and lightness for transport is good. But the dream is also light in rectangular shape!
There should be 4 tie rods to compress the bag and not 3.
Nice product
Nothing to say
Very good product, comfort and protection from the cold
Very good product in value for money.
It was really good
Great
Not a perfect item, sleeping Quality very bed
Very good product !
still a little thick for high mountain hiking
A sleeping bag in which you can choose the size, with a nice color and very good thermal qualities. Easy to carry with its small size. I recommend it especially as it is good value for money.
Despite being in a -3 zone, with thermal clothing and a blanket you won't get cold. It is comfortable and spacious, highly recommended
Ok
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.
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Research and development
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Backpacking Sleeping Bag MT500 41°F - Polyester
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Heavy products return policy
If you return a product you will receive a refund for the purchase price plus any applicable sales taxes, less any non-refundable charges.
Decathlon will cover all shipping costs associated with your return except for items excluded from our return policy such as bikes, basketball hoops, snowboards, surfboards, tents, and other larger / heavier items.
Return costs for heavy products:
Weight Thresholds | Shipping within California | Shipping outside of California |
---|---|---|
> 9 lbs | $20.00 | $25.00 |
> 30 lbs | $50.00 | $65.00 |
> 100 lbs | $100.00 | $125.00 |
> 200 lbs | $200.00 | $230.00 |
If you return a product at any of our store locations, we will gladly help you find the best alternative product or refund you on the spot.
