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Forclaz MT900 Down Sleeping Bag

Sale price: $100.00 Regular price: $149.00

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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Sale price: $100.00 Regular price: $149.00

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San Francisco, 735 Market St. Options

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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
Model: 8618872

Product Features

Forclaz MT900 Down Sleeping Bag | This 2 season sleeping bag with RDS-certified* down and feathers lets you sleep comfortably at temperatures above or equal to 50°F.

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.

A photo of the Forclaz MT900 Down Sleeping Bag in use
A photo of the Forclaz MT900 Down Sleeping Bag in use

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


Ethically-produced down with a fill power of 800 CUIN


non-twinnable sleeping bag

Questions & Answers

Look for product information, frequently asked questions, opinions...


What is the difference in the 2 down mt900 sleeping bags? One is model 8575969 and the other is model 8618872.


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.

By Chris on Nov 24, 2023 | STAFF


Hey! Does this sleeping bag have an insert sleeve for a sleeping pad?


This sleeping bag does not come with a pad sleeve but we sell sleeping pads with anti-slip silicone on them.

By Chris on Mar 4, 2024 | STAFF

Product Customer Reviews

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194 Reviews
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Superb product, light for…

Superb product, light for transport while hiking and very comfortable...

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A good product not yet used outside but comfort

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Small, light, practical bag…

Small, light, practical and warm bag. Everything is summed up for this super good quality bag. Recent but conclusive experience.

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Be careful when washing

Very good sleeping bag, be careful however, the maintenance precautions specified on the bag and the site are not correct. The bag was washed at 30°C delicates and it is ruined... all the feathers have stuck together and it is unusable. It would be nice to modify this element on your next bags.


if you are not a super professional, you will be delighted

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Sleeping bag

I am very happy with my purchase, this sleeping bag is super compact and light. In terms of comfort, I would have appreciated if the bottom of this sarcophagus shape was a little wider so that it would be more comfortable.

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I just used this…

I just used this sleeping bag on the GR20 trail for 5 days, it was perfect for its sleeping quality and weight. I highly recommend

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Very disappointed very little…

Very disappointed, very few feathers, in places there is only the canvas. I was very cold at 15 degrees. Does not correspond at all to what I was told in the store sold for comfort at 10 degrees. I regret this purchase. And we advise against it, deplorable value for money.

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Warmth factor is enough

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Good product

Tried it for a week in Scotland. I came across a week with temperatures between 5 and 10°. To do it again I obviously took the "colder" model but with tights and a t-shirt it worked. Easy to carry and store in its bag. My traveling companion had a bag from another brand in which there was a small pocket which allowed him to keep his phone warm in order to save battery life... perhaps something to consider on future models as it is very practical.

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it matched

Tested on a 30-day bicycle (bikepacking) tour. I slept in this every day. It provided adequate insulation even below 10 degrees, there were no problems at around 8 degrees! It can be folded into a small space and the compression bag is also excellent.

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Compact, warm, well finished,…

Compact, warm, well finished, it's a good product but a generous size (>90kg) will feel a little cramped

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Very convenient

Light and practical product, takes up very little space in the backpack when you go hiking for several days

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A summer down sleeping bag with a great price/performance ratio, really only for summer, at lower temperatures I was cold without a warm T-shirt and socks, packable in a small compression pack. The size fits, I'm 180 cm - I originally wanted to buy an M, the length fits me too, but the width is narrower, so the L size is OK. Some may not like the shape of the hood and the fact that it cannot be unzipped all the way to the feet.

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The form for…

The shape for the feet is great and makes it more comfortable. The hood would benefit from being a little bigger. If there is no weight constraint, do not hesitate to take a size larger for a little comfort even if the size is good

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Additional Product Information


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.


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.


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.



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


Size Guide Visual

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