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Forclaz M100, Foam Hiking Mattress

Regular price: $9.99 Regular price:

7.4 oz the lightest foam mattress and groundsheet. 70.9" x 19.7" x 0.3" for minimal comfort. 10-year warranty.

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Sale price: $9.99 Regular price:

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San Francisco, 735 Market St. Options

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Model: 5591048

Product Features

Forclaz M100, Foam Hiking Mattress is designed for Passionate about backpacking,our designers have imagined this mattress to protect themselves from ground&sleep in trek/bivouac/protect your inflatable mattress.

7.4 oz the lightest foam mattress and groundsheet. 70.9" x 19.7" x 0.3" for minimal comfort. 10-year warranty.

A photo of the Forclaz M100, Foam Hiking Mattress in use

Abrasion resistant

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

Easy to transport

Weighs 7.4 oz. Volume when rolled: 6.6 L. Elastic strap.

Sleeping comfort

Dimensions 70.9" x 19.7" x 0.3". Simple and cursory postural comfort.


Ideal for warm environments (>59°F). R-Value 1.2

Easy assembly/dismantling

Rolled foam. Elastic strap.


Product Customer Reviews

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Forclaz M100, Foam Hiking Mattress,pewter
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Perfect for my needs

I wanted a foam pad for layering under my inflatable for snow camp. This has an R value of 1.2 and is a lot lighter than my thermarest z-lite which I was using before. I guess I could use it alone for a summer backpacking trip but it wouldn't be very comfortable on its own. Underneath another pad, this adds enough cushion and insulation that would make sleeping on snow a lot more comfortable.


I enjoyed

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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.

Great roll mat

Good price and works well

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missing in the delivery

missing from my delivery

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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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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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Camping mat

Used outdoors on grass. Comfortable. No princess and the pea type complaints.

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Good value

Lightweight and good value for money. Like the piece of elastic that comes with it to keep it rolled up. A good touch. Bought the thinner mat as lighter but still reasonably comfortable. Perfect for my son's DofE.

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Sleep tight

This is good for its lightweight carry on

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M100 Foam trekking matteress

We bought these for my husband and son as they were going on a camping trip. They both found them very uncomfortable to lay on. We did wish we had bought an inflatable mattress which is what we will be doing for future camping trips.

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M100 Foam trekking matt review

You might as well just sleep on the floor with nothing else, this made no difference whatsoever whilst waking up with aches all over me

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Good, used it for the Reading festival


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Additional Product Information



  • 100% Polyethylene low density

Volume and dimensions when folded

Rolled dimensions Ø 5.1" x 19.7". Volume 6.6 L. Density of the foam 66.1 lbs/m3.

Thermal properties and warmth

Sleep on aluminized side, facing the sleeping bag with foam side on the ground to minimize 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 -11°F. 0.7 is equivalent to a temperature rating of +52°F. 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 Center. 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.

A score for comparing products' environmental impact

The environmental impact of the products is calculated based on the lifecycle of the product with different indicators. An ABCDE score is provided to help you easily identify the most environmentally friendly products. Use the rating to compare the same type of product (T-shirts, pants, backpacks). Decathlon is a supporter of this environmentally-friendly labeling approach. Explanatory video:



Product testing

This mattress is guaranteed for a period of 10 years from the date of sale indicated on the receipt. The product covered by the warranty will be repaired or exchanged free of charge. The warranty covers the defects of your mattress apart from those resulting from normal wear and tear and improper use. This special 10-year warranty is only valid with the product and sales receipt.

Care instructions

Do not machine wash the mattress. Wipe with a damp sponge when needed. To dry, stretch out in a dry and well-ventilated place without exposing to the sun or close to a heat source.

Superior quality. Unbeatable prices.

For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.

Decathlon makes the difference
  1. product-research

    Research and development

    delivers high-quality cost-effective products

  2. State-of-the-art production processes

    minimize manufacturing costs

  3. Optimized supply chain

    reduces retail prices

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    Minimal retail footprint

    lowers overhead and indirect costs


Size Guide Visual