Product Colors and Sizes

  • Black Friday product
  • New Deal product
  • Cyber Monday product
  • Clearance product
  • Deal product
  • Best Seller product
  • Ecodesign product
  • New product
  • Staff Pick product
  • In The News product
  • Innovation product
  • product

Forclaz Trek 500L Self-Inflating Backpacking Mattress

Sale price: $49.99 Regular price:

You will like the easy inflation of this MT100 self-inflating mattress. And its 2.5 cm thickness provides good comfort.

Color: Select a color
Size: Select a size
Sale price: $49.99 Regular price:

Free shipping over $49

Free returns

Free pickup

San Francisco, 735 Market St. Options

Select an available color and size to see options.

About this item:

  • R-Value 2.7 2 to 3 seasons of use (>5°C/41°F)
  • Weight:1.8 lbs. Dimensions: 70.9” x 20.5” x 1” Packed Volume: 7 L Ø 6.9” x 13”.
  • Easy assembly/dismantling: Self-inflating. Efficient 2-way valve with anti-return for easy handling. Carry Bag Included
Model: 8736599

Product Videos

Product Features

A photo of the Forclaz Trek 500L Self-Inflating Backpacking Mattress in use
A photo of the Forclaz Trek 500L Self-Inflating Backpacking Mattress in use

Forclaz Trek 500L Self-Inflating Backpacking Mattress | Our designers, who are trekking enthusiasts, designed this compact mattress to insulate you from the ground and sleep well while bivouacking.

You will like the easy inflation of this MT100 self-inflating mattress. And its 2.5 cm thickness provides good comfort.

Easy to transport

Weighs 820g. Volume: 7 litres. Ø 18 cm x 29 cm.Carry bag.

Sleeping comfort

Dimensions 180 x 52 x 2.5 cm. Thermal insulation.Adjustable comfort.

Thermal insulation

2 seasons of use (>5°).R-Value standard ASTM F3340-18: 2,7

Easy assembly/dismantling

Self-inflating. Efficient two-way valve with anti-return for easy handling.


Anti-slip silicon pads. Limits slippage of the sleeping bag.

Product Lifestyle Image Gallery

Image Gallery

Forclaz Trek 500L Self-Inflating Backpacking Mattress, gray Image 1 of 5 

Forclaz Trek 500L Self-Inflating Backpacking Mattress, gray Image 2 of 5 

Forclaz Trek 500L Self-Inflating Backpacking Mattress, gray Image 3 of 5 

Forclaz Trek 500L Self-Inflating Backpacking Mattress, gray Image 4 of 5 

Forclaz Trek 500L Self-Inflating Backpacking Mattress, gray Image 5 of 5

Questions & Answers

Product Customer Reviews

Skip to reviews
1330 Reviews
Write a Review 
Forclaz Trek 500L Self-Inflating Backpacking Mattress, gray Image 5 of 5
Filtered by reviews Loading reviews…

Practical, comfortable despite its low thickness

icon-circle-checkmark verified purchase

Very pleasant, the anti-slip pads are very well thought out.


icon-circle-checkmark verified purchase
goes beyond what is required

I have tried it in trekking (tents and shelters) and in the middle of the mountains. The adhesive strips do their job, the bag does not slide. The auto-inflation system depends a lot on height, but nothing that cannot be compensated for by blowing to increase the pressure. As they are R2 on snow, additional insulation is required (or another mat with better performance). I use an EVA mat (insulates heat and punctures) if it is for long treks.

Good product. I think it would be more comfortable if it didn't have a shorter width in the foot area.

icon-circle-checkmark verified purchase
I'ts cool

A very decent mat. I have been using it for over a year in a hammock from spring to autumn - without any problems. It packs well, is not small, but provides good insulation.



icon-circle-checkmark verified purchase
good value for money…

good value for money ; you should expect to sleep with the feeling of a hard floor


I find the comfort really mediocre. It can help but a fragile back should be avoided!

I like

Works well and is easy to move

very good product

very good product

A bit bulky but...

A little bulky but effective

Recommended and in case of emergency it serves as a mattress

icon-circle-checkmark verified purchase

I want it like this. But the toes are straight. rectangular

icon-circle-checkmark verified purchase
It is good but it doesn’t inflate by itself

Misleading. Self inflate means you do it yourself? As you have to blow air inside and does not inflate itself. However it is very fast. It is light weight and comfortable. Be aware it is not too large on the side and just my size from top to bottom. I’m 182cm, taller people might not fit.

icon-circle-checkmark verified purchase
Skip to reviews

Additional Product Information


Foam: 100.0% Polyurethane ; Floor mat: 50.0% Thermoplastic Polyurethane, 50.0% Polyester ; Main fabric: 50.0% Thermoplastic Polyurethane, 50.0% Polyester ; Carry bag: 100.0% Polyester

The principle of a self-inflating mattress

A self-inflating mattress consists of an airtight envelope glued to an open cell foam in which the air circulates. When you unfold your mattress, it will regain its shape and thickness (2.5 cm for this MT100 mattress) and fill with air. However, it requires some mouth inflation so you can adjust it to the pressure level suitable for you. Self-inflation is more or less noticeable depending on the thickness of the mattress.

Easy inflation/deflation

When using your mattress for the first time, unroll it, open the valve for 24 hours on a flat surface, then inflate it and leave it for 24 hours, valve closed, under pressure. Then you can store it away again. While trekking, take out and unroll your mattress as soon as you set up camp, valve open to facilitate pre-inflation. A self-inflating mattress inflates to about 60 to 70% on its own. You will need to blow up the rest yourself, so you can adjust the pressure to your desired comfort level.

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.Please note that the R-Values can be added; this means that you can use two mattresses and add their R-Values.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: 2 or 3-season (spring-summer-autumn)R-value from 3 to 4: 4-seasonR-value of 4.5 and higher: Use in all 4 seasons and in extreme conditions (glacier, far north and high altitudes)

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.

Additional sustainable development information

Textile dyeing requires a lot of water but also produces waste water from the dye baths. To reduce the environmental impact of this model, we chose to use a dyeing process called ”bi-ton” which involves dyeing one out of every two yarns. This dyed yarn is also made from a bulk dyeing process which incorporates the colour pigments from the yarn manufacturing phase onwards.This process reduces this product’s CO2 emissions compared to the previous model.

Product testing

All our mattresses undergo mechanical performance and resistance tests to guarantee you the best night's sleep and recovery (thermal and abrasion resistance, etc.). We also carry out several field tests in real-life conditions.

Storage instructions

In order to improve the durability and reliability of your product, store it laid out flat with the valve open in a dry place away from extreme temperatures.



Law label information

Click here to see the product label

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

  4. laptop-checkout

    Minimal retail footprint

    lowers overhead and indirect costs


Size Guide Visual

Please Sign In to Post Your Question

In order to notify you about the answer it is required to Sign In.

Sign In