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Trekking Foam Mattress Arpenaz M100 - Grey

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Regular price Regular price: $29.00 Sale price Regular price:

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A photo of the Trekking Foam Mattress Arpenaz M100 - Grey in use

Trekking Foam Mattress Arpenaz M100 - Grey
Passionate about trekking, our designers have imagined this mattress to protect themselves from ground & sleep in trek/bivouac/protect your inflatable mattress.

210 g the lightest foam mattress and groundsheet. 180 x 50 x 0.7 cm for minimal comfort. 10-year warranty.

Abrasion resistance

Alu film on upper surface reducing abrasion & increases thermal insulation.

Easy transport

Weighs 210g. Volume when rolled: 6.6 L. Elastic strap.

Sleeping quality

Dimensions 180 x 50 x 0.7 cm. Simple and cursory postural comfort.


Ideal for warm environments (>15°C).R-Value 1.2

Easy assembly / dismantling

Rolled foam. Elastic strap.


Product Reviews

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36 Reviews
Write review Trekking Foam Mattress Arpenaz M100 - Grey
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A much needed item for camping

It’s my first time to camp and I was thinking of foregoing this item, but when I saw the price, I decided, I better get it just in case. Thank God for my last minute decision. We set up a tent on a cemented area and my back would have been in pain the next day. With the isomat, it was firm but not as hard as a cement floor. So it was a big help.

Marie Ann
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Hi Marie Ann,

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 sport 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!


Decathlon Hong Kong Hiking & Trekking Team

Terrific purchase

Very lightweight and excellent insulation mattress.

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Good mattress for maximum portability

I used this mattress while camping in a tent and had no problem with it. The material is relatively soft and offers a good thermal insulation. No signs of consumption in the material after use several times. I would recommend this product if you are looking to camp far away from you car and you are looking for maximum portability, when carrying an inflatable mattress+pump is not an option.

Valentino Cosma
Excellent Buy

Very Nice!

Great roll mat

Good price and works well

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I enjoyed

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So light to carry around and of course good price point. Prefer slightly wider though.

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Hi Sann,

Thank you for taking the time to review our products. We are pleased to hear you enjoy using this Trekking Foam Mattress Arpenaz M100! Your feedback is greatly appreciated, our design team will look into it to improve our future designs!

We look forward to more of your reviews and sharing! Plus, the new Decathlon app has been launched and you can now purchase all your favourite sports goods with just a few clicks on your smartphone! Yes, it's now available both in the App store and Google Play Store! Download now and happy shopping!

Thank you for your support and stay safe! :)

Sport on safely!


CSM Digital Leader

Nice product

Nice product

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missing in the delivery

missing from my delivery

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Perfect for using as mattress inside tent

Had a comfortable sleep inside my tent using this as sleeping mattress

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good but bad in humid/wet condition

mattress soakes water in wet conditions and becomes unusable

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Great value

Good value product

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Gets the job done

For what it's worth, it gets the job done. Only bought it, as I didn't want to spend too much on a self-inflatable mat. It kept me reasonably warm and insulated from the ground. However, I will be looking at self-inflatable mats for my next trip.



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 Thank you very much for your review! 


Good value, lightweight, good comfort

Great trekking mattress for Duke of Edinburgh silver. Lightweight and compact enough to carry on the backpack but big enough to provide insulation and comfort.

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Product information



  • 100% Polyethylene

Volume and dimensions when folded

Rolled dimensions Ø 13 x 50 cm.Volume 6.6 L.Density of the foam 30kg/m3.

Thermal properties and warmth

Sleep on aluminised side, facing the sleeping bag with foam side on the ground to minimise losses of body heat.R-Value 1.2 (measured by EMPA, an independent laboratory).The R-Value is a measure of thermal performance and insulation. The higher the R-Value, the more the mattress insulates you from the cold ground.An R-Value of 5.9 is equivalent to a minimum temperature rating of approximately -24°C. 0.7 is equivalent to a temperature rating of +11°C.R-Value is not a standard (in progress).

Product test

The sleeping comfort, also known as "postural comfort", of the mattresses is defined by our Research and Development Centre. All our mattresses are subjected to mechanical tests to check the performance and resistance of the mattress in order to guarantee you the best sleep and the best recovery. We also carry out numerous field tests in real-life conditions.


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