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Forclaz MT900 Comfort Air Mattress

Sale price: $109.00 Regular price:

At 2.4 inches thick, the MT 900 Air mattress is very comfortable. It's also lightweight (1lb. 4.5oz/580g). The bag is used as a pump bag for easier inflation!

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Sale price: $109.00 Regular price:

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San Francisco, 735 Market St. Options

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About this item:

  • Dimensions 70.9” x 22” x 2.4”. Rectangular shape. Smooth surface
  • Use during the summer season. R-Value 1.4
  • Weighs 1lb. 4.5oz (580g). Volume: 2 liters. Carrying pouch that turns into a pump
  • Inflate with the built-in pump bag. Bi-valve: IN with anti-reverse - OUT deflate
Model: 8883440

Product Features

A photo of the Forclaz MT900 Comfort Air Mattress in use
A photo of the Forclaz MT900 Comfort Air Mattress in use

Forclaz MT900 Comfort Air Mattress | Our design team of trekking enthusiasts has created this inflatable mattress to provide restorative nights after the day’s activities!

At 2.4 inches thick, the MT 900 Air mattress is very comfortable. It's also lightweight (1lb. 4.5oz/580g). The bag is used as a pump bag for easier inflation!

Easy to transport

Total weight 580 g (mattress only 530 g). Volume: 2 litres. Travel bag

Sleeping comfort

Dimensions 180 x 56 x 6 cm. Rectangular shape. Smooth surface

Thermal insulation

Use during the summer season. R-Value 1.4 according to standard ASTM F3340-18

Easy assembly/dismantling

Inflate with the built-in pump bag. Bi-valve: IN with anti-reverse - OUT deflate


Anti-skid silicone patches on both sides. Limits slipping

Questions & Answers

Product Customer Reviews

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15 Reviews
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If you decide to replace it at any time, the price will not hurt you, so you can give it a try.

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The inflatable method is very convenient. It is more stable when sleeping.

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Compact, light and comfortable.…

Compact, light and comfortable. Easy to inflate and store


Very light mattress with a very interesting grip concept

Fragile mattress

I bought this mattress because it has a promising new look which promises superior comfort to the other model in their range Unfortunately I didn't have time to try it from the first use I found myself on the floor in the middle of the night impossible to find the cause I tried several times to reinflate it to check the valves nothing in the end I recommend against it

very light and compact

my daughter used it this summer and really appreciated its ease of storage, its weight

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Very comfortable

More comfortable than significantly more expensive premium brand models that I have had before. Less feeling of “rolling” when moving at night. A little heavier too, but with this thickness I suppose that's normal. Obviously a little dusty after a few uses, but it's acceptable and it's for a good cause. The double valve is practical and seems an a priori reliable solution - which was not the case on all the models I had.

Excellent price/quality ratio.

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Missing the same mattress…

Missing the same mattress with thermal insulation

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Very good evolution of the MT500

Used for hiking (autonomy) and bikepacking, this mattress is light and takes up little space when folded. It also corrects the main problems of the previous model (MT500): - Once inflated, the surface is very flat, unlike the MT500 and its "fluffs", - more anti-slip patches above and below for better support on the tent floor and better grip of the sleeping bag (the MT500 was a real soap). Other advantages: - The inflation bag integrated into the transport bag is very practical, - the slightly larger width for more comfort (often 20 in/51 cm for other brands). The only criticism I can make is that you have to find the right inflation to be comfortable on it. You have to use the trick of inflating it well and pressing the air inlet valve to deflate it gently and find the “sweet spot”. Overall, very good value for money in the lightweight mattress category. Suggestion to the development team: a super wide “deluxe” model (30 in/76 cm) for people who move around a lot.

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disappointing thermal insulation

I am very satisfied with the comfort. After trying all the Decathlon hiking mattresses, this is the only one that allows me to sleep comfortably. On the other hand, for the so-called "high-end" mattress from Decathlon, they could have made a 3-season mattress rather than one that can only be used in summer. If you have to add a foam mattress in winter it is no longer the same weight.

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Not wide enough

Not wide enough

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Comfortable and practical summer mattress

Trial for 14 days and in summer hiking. Mattress of a range equivalent to the major hiking brands and at a slightly lower price. Storage bag for inflating the mattress. Very good mattress, to buy without hesitation if it is in your budget.

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Even on a bed...

Even on a bed of pebbles, this mattress offers us comfort!


ข้อดี - เสียงเบามากตอนขยับตัว - ถ้าคนชอบนอนเตี้ยๆจะนอนสบายไม่โอบตัว -การประกันดีมาก -เนื้อสัมผัสค่อนข้างดี การแบ่งช่องลมต่างๆดี ข้อเสีย - เตี้ยไปหน่อย - การเก็บงานรายละเอียดงานไม่เนียบ - การเป่าลมยังยากเหมือนเดิมให้ใช้เครื่องเป่าลมของแผ่นรองนอน ถึงจะไวขึ้นง่ายขึ้น - การจัดเก็บยังเอาลมออกยาก - ขนาดจัดเก็บค่อนข้างใหญ่
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Additional Product Information


Main fabric: 50.0% Polyurethane, 50.0% Polyamide

How to choose the size of your mt900 mattress

This model is available in L and XL version. The difference between the 2 sizes on the length (180 cm for the L; 195 Cm for the XL) and width (56 cm for size L; 63 cm for the XL).To choose the mattress that best suits you, you must consider your stature, but not just that. Your preference and/or your preference for space around your shoulders should also be considered. So, even if you are 1.75 cm, you will prefer the XL!

How to inflate your mattress

To prevent moisture from being blown into the mattress, we recommend that you use the pump bag in the pouch.To do this, unroll the entire pump bag/pouch. Connect the valve of the pump bag to the “IN” valve of your mattress. Blow to about 10-20cm from the inlet of the pump bag, to inflate the main volume as much as possible. Roll the bag on itself to the valve to push the air out of the main bag into your mattress.

Tips for sleeping well on your mattress

Once you are lying down, remember to adjust the inflation pressure of the mattress by slightly pressing the IN valve (open cap). A mattress that is too hard is often synonymous with discomfort.Silicone patches on the top of the mattress are designed to reduce the sliding of your sleeping bag on the mattress.Other patches on the underside reduce the slippage of the mattress on the floor of your tent.

How to repair a leaky mattress

An inflatable mattress is not puncture-proof, but it can be repaired!When using it, take every care when installing and handling it. In the event of a problem, we recommend using self-adhesive repair patches (ref: 8557113).More care advice is available on the Decathlon Sport Advice website.

What is the r-value?

The R-Value is a measure of the thermal insulation. It measures the ability of a mattress to retain or prevent heat from escaping from a warm body (human body) to a cold floor.The higher the R-Value, the better the insulation of the mattress.It should be noted that R-Values add up; this means that you can use 2 mattresses and add up their R-Value.All our mattresses are tested to standard ASTM F3340-18.

What r-value for what use?

R-value from 0 to 1.9: Hot season (summer) onlyR-value from 2 to 3: Use over 3 seasons (spring/summer/autumn)R-Value from 3 to 6: Use over 4 seasonsR-Value > 6: Use in all 4 seasons and in extreme conditions (glacier, far north and high altitudes)

Volume and folded size

Folded dimensions Ø 9 cm x 30 cm.Volume: 2 litres.

Storage instructions

To ensure that your product lasts for a long time and that it continues to work as it should, store it flat, valve open, in a dry, temperate place.




Size Guide Visual

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