Maintaining and repairing a trekking 500 self-inflating mattress

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We firmly believe that the life cycle of a product does not end when it gets damaged. This is why Decathlon is offering solutions for properly using, maintaining and repairing your product, in order to extend its lifespan.

This lightweight, comfortable and easy-to-inflate Trek 500 self-inflating mattress is a great solution for all your bivouacs. We are here to answer all your questions or help you if you encounter a problem.

Using your mt100 self-inflating mattress for the first time

How to inflate your mattress ?

It is really important to inflate your mattress to a good pressure.

A self-inflating mattress inflates itself to approximately 80% full. So, leave it for about 20 minutes with the IN valve open and then adjust the pressure using mouth-inflation.

This mattress uses an anti-return valve system: the IN valve draws in air but can also expel it by pressing the little black clip if you want to adjust the pressure while lying on the mattress.

Do not over-inflate in order to reduce wear and tear, and avoid damaging your back, but inflate the mattress enough so that it is comfortable and allows you to sleep properly. When you sit on it, your bottom should just brush the ground.

How to deflate and fold this mattress into its bag ?

Open the OUT valve and roll up the mattress to expel the air.
When you've finished rolling it up, close the OUT valve and unroll it.
Then roll it up tightly. When you've almost finished this step, open the OUT valve and complete the folding process with the OUT valve open.
Your mattress should now be very compact and easy to fold up into its bag.

Important: the mattress must be rolled up rather than folded up over its length: if not, some air will get stuck, thereby increasing the volume of the mattress, and you will not be able to store it properly in its bag.

How to deflate and fold a trek 500 self-inflating mattress

How to sleep well on a self-inflating mattress ?

You can maximise the comfort of the mattress by inflating it to the right pressure. When sitting on it, you should be able to feel the ground. When you are lying down, the air will spread evenly under your whole body.

For even more comfort, use a sleeping bag with the correct temperature rating, as well as a pillow.

How to stop your mattress from making noises ?

When you sleep, the sound of rubbing between the mattress and the ground can be annoying.
Do not over-inflate in order to minimise this problem.

You can also put a blanket or a sheet under the mattress.

How to optimise the insulation from the ground ?

If you want to improve the thermal insulation of your mattress and get better protection from the cold and moisture of the ground, you can put a foam mattress or a survival blanket under your mattress, or a groundsheet under your tent.

How to optimise the insulation from the ground of your trek 500 mattress

Repairing your mt100 self-inflating mattress


Your mattress appears to have a hole in it and you are probably wondering where the leak is coming from. Indeed, it is difficult to spot a hole in the mattress with the naked eye.

  • leak on the surface of the trek 500 self-inflating mattress

    The leak is on the surface of the mattress

    Inflate the mattress and wet the surface with soapy water. If air bubbles form, then you have found the spot where your mattress has a hole in it. All you have to do is stick a patch on the spot

  • leak at a weld of the trek 500 self-inflating mattress

    The leak is located at a weld

    Apply a specialised glue according to the instructions for use and follow the recommended precautions.

  • leak at the valve of the trek 500 self-inflating mattress

    The leak is at the valve

    Check that the cap of the mattress is properly clipped in place so that no air can escape and there are no slow leaks. If you have carried out this check and the valve really seems to be faulty, go to the store to bring your mattress back.


Once the location of the leak has been identified, all you have to do is deflate it and apply a patch to repair your mattress. The video below explains the entire process on how to perform this repair. Each of our mattresses comes with a patch kit but if you no longer have any, click hereto check out our products.

How to repair a hole in your trek 500 self-inflating mattress

Maintaining your mt100 self-inflating mattress

Here are all the tips you need to maintain your mattress in the best possible way. The key to properly maintaining your mattress are the washing, folding and storage steps. 

Maintaining your trek 500 self-inflating mattress


With soap or washing-up liquid, gently rub the surface of the mattress to remove any dirt.
Do not dry your mattress in the sun, but use a cloth instead.

Fold up

Follow all of our advice for folding your mattress in the user advice section.


Mattresses are sensitive to heat and humidity. So, store them in a dry place at a moderate temperature.
If possible, lay them flat with the valve open.