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Forclaz MT900 50°F Down Sleeping Bag
This sleeping bag is warm and light thanks to the loft (800 CUIN) of the down used, and is also very compressible. Mummy shape and adjustable hood with good coverage and a drawstring.
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Final Sale: No returns or exchanges
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San Francisco, 735 Market St. Options
Select an available color and size to see options.
About this item:
- Comfort Temperature 50°F/10°C I Temperature Limit: 41°F/5°C
- Size L Weight: 1.5 lbs (700 g) I Volume: 4.9 L I Stuff Bag Included
- RDS ethical down with a fill power of 800 CUIN
- Water repellent: Outer surface of the fabric is treated
- Mummy shape, anatomical hood. 1 long zip on the left with a double slider
Product Features
Optimal temperature
Comfort temperature 10°C, limit temperature 5°C
Easy to transport
For size L. Weight: 700 g. Volume: 4.9 litres.Stuff Bag
Sleeping comfort
Mummy shape, anatomical hood. 1 long zip on the left with a double slider
Water repellent
Outer surface of the fabric is treated so that water runs off the surface
Warmth
Ethically-produced down with a fill power of 800 CUIN
Compatibility
non-twinnable sleeping bag
Questions & Answers
Look for product information, frequently asked questions, opinions...
Question:
What is the difference in the 2 down mt900 sleeping bags? One is model 8575969 and the other is model 8618872.
Answer:
There is no difference other than the number. We switched codes and only had a couple left of the first code so priced it less to sell out quickly.
Question:
Hey! Does this sleeping bag have an insert sleeve for a sleeping pad?
Answer:
This sleeping bag does not come with a pad sleeve but we sell sleeping pads with anti-slip silicone on them.
Don't see the answer you're looking for?
Product Customer Reviews
This is a super light 2-3 season bag wich retains reasonable warmth, but the biggest issue is the size. I'm 177cm medium build and the large bag is far too narrow not to feel constricted. If you try zipping the bag up all the way as demonstrated in the picture, you'll barely be able to move your arms to unzip yourself. Likewise the footbox is extremely narrow, so even with my height which is well inside the limit for a Large, it feels like I'm straining at the edges of the bag.
Good
Good
Good
Good but you must not go below 10 degrees as suggested on the cover
For a week I have been sleeping in it at a room temperature of 16°C. I am cold....
I have used it several times now, and I must say that it has always done its job very well, even though I have used it in conditions outside the temperature limit. obviously I will have to buy one to use for temperatures around zero or slightly below, but this sleeping bag has really satisfied me. closed in its bag it also becomes very compact.
Sleek, mobile, quite warm
Light and takes up little space, but warm. Perfect for trips from spring to autumn.
High comfort
Small storage space, a bit expensive
The lowest temperature I slept in was zero degrees. I slept under a tarp, so in an open shelter, only in thermal underwear. I didn't freeze, although a slight chill woke me up a few times during the night. At nights above 15 degrees it is definitely too warm, then a two-way zipper comes in handy, because you can open the inflow of cool air. It compresses nicely, so it takes up little space in transport.
Warm and lightweight, it doesn't take up too much space when you bring it on the plane Recommended
It is warm enough and lightweight, so it is not too heavy to carry when climbing the 100 largest mountains. It is a very suitable product. The price is also moderate, so it is a highly recommended product.
Additional Product Information
Composition
Filling: 90.0% Grey Duck Down, 10.0% Grey Duck Feather ; Lining: 100.0% Polyamide ; Shell: 100.0% Polyamide ; Carry bag: 100.0% Polyester ; Bag cover: 100.0% Polyester ; Coating: 100.0% Polyurethane
What is the temperature rating?
All our sleeping bags display the temperature ratings, tested by an independent laboratory (AITEX), in accordance with the European standard NF 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).
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
The mummy shape optimises thermal insulation (no loss of heat because there is not much air flow or draughts) and saves space, which means that your movements are restricted.Width at the shoulders 73 cm, height at the feet 27 cm in size L.
Weight and dimensions
Size S: 560 g, user up to 1.59 m. Bag dimensions: Ø 12 x 34 cm. Volume 3.5 L. 260 g down/feathers.Size M: 620 g, user between 1.6 m and 1.69 m. Bag dimensions: Ø 13 x 34 cm. Volume 4.2 L. 260 g down/feathers.Size L: 700 g, user between 1.7 m and 1.84 m. Bag dimensions: Ø 14 x 34 cm. Volume 4.9 L. 300 g down/feathers.Size XL: 780 g, user from 1.85m to 2m tall. Bag dimensions: Ø 15 x 34 cm. Volume 5.6 L. 340 g down/feathers.
Functions
Anatomical hood with good coverage and drawstring adjustment.A baffle along the zip prevents heat loss.Double-slider zips for optimal ventilation.X-shaped compartmented structure, through-stitching.
The advantages of a duck down and feather filling
The filling power of down has 3 advantages for mountain sports: - Thermal insulation thanks to the air trapped in the down and feathers- Ultra low weight: down is lighter than synthetic wadding while offering the same degree of warmth. This saves even more weight in your backpack- Ultra-compressible
How to measure the fill power of a down and feather wadding?
The fill power is a measure of the down fts thermal insulation capacity and its potential to Inchtrap Inch air. It is expressed in CUIN (cubic inches).So, down with a higher fill power (higher CUIN number) will occupy more space, trap more air and provide greater thermal insulation.For this sleeping bag with its 90% down / 10% feathers filling, the fill power is guaranteed to be 800 CUIN or more (international IDFB standard).
Storage instructions
To maintain its fill power, which is necessary for its insulation properties, store your sleeping bag by stuffing it in the mesh bag provided, feet first. Can be stored flat.
Origin
Imported
Law label information
Size M, click here to see the product label
Size L, click here to see the product label
Size XL, click here to see the product label
Forclaz MT900 50°F Down Sleeping Bag
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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.
