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100 Boxing and Martial Arts Mouthguard Size L - Clear

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Sale price: 2.000 KD

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protecting adults' teeth by limiting the impact of blows, reducing vibrations and preventing their teeth from clattering together.

Thermoforming mouth guard for adults doing boxing and martial arts (boxing, Muay Thai, kickboxing, full-contact karate, taekwondo). Complies with the new XP S72-427 standard.

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Sale price: 2.000 KD

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Product Videos

Product Features

A photo of the 100 Boxing and Martial Arts Mouthguard Size L - Clear in use

Impact protection

Complies with the new XP S72-427 standard

Easy breathing

2 mm ventilated space to let air circulate as you exercise.

Anatomic design

Heat-mouldable for a perfect fit.

Puncture resistance

Single layer of material 5 mm thick.

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Product Reviews

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1029 reviews

100 Boxing and Martial Arts Mouthguard Size L - Clear
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Gum shield

Not true to size. Can i change it after i opened box?

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Too big

This is way too big, it hurts my jaw!

Thanks for your opinion on Mouthguard Size L - Black. I'm sorry to hear about your issue with the size of the mouth-guard. We do have the size S as well or, in the new models 500, even the M. I suggest you to try with one of those smaller size
Don't forget you can claim a total refund or a product change in your nearest Decathlon store
Kind regards

Very bad product

I bought a mouthguard for the second time at decathlon because the first one i thought i had messed up as the product would not stay on the upper tooths and was way too big for the under teeth. So i bought it for the second time to see if it would make a difference if i would exactly follow the instructions, same result! What a waste of my money , TWICE! How can you sell a product that does not do its work, even with the instruction video you can see that the product is way to big. Really dissapointed !

Thanks  a lot to send us your opinion on  100 Adult Mouthguard. I'm sorry to hear all your trouble to fit the mouth-guard. Your kind of feedback are very useful for our product managers in order to design and produce better products.
Don t forget you can claim a total refund or a product change in one of our Decathlon store
Kind regards


Works well so very happy

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Very poor fit - check end of video on this page!

For the very cheap price I thought I'd try one of these for a laugh after deciding to do a bit of sparring after a long absence. Following the application instructions to the letter I'm left with at least 6mm extra plastic at the bottom below my teeth, hence not fitting at all and falling out. You can see for yourselves how very badly this mouthguard fits the model in the Decathlon video on this page, he's got more mouthguard below his teeth than actually on them, mine is exactly the same. I wouldn't waste time returning but it shall be going in the bin & I'm off to the dentists to get a proper one, that actually fits. Waste of time and money.

Thanks for let us know your opinion on 100 Adult Mouthguard. This kind of very detailed feedback are really important for us in order to develop better products that can meet your expectations and be useful to practice boxing. I ll pass it to our R&D department.
Thanks again and sorry for any problems caused by the item
Kind regards

100 adult mouthguard

Used by our son, 12 years old, for PE lessons at school. Relatively straight forward instructions to follow to mould to teeth.

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Have tried various mouthguards for my 13 year old and this is the best he has tried

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100 Boxing and Martial Arts Mouthguard Size L


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Hello Walter,


Thank you for your feedback on our product!


We are sorry to hear about your encounter. In order to have a deeper understanding of your situation, our staff will contact you in a while. Thank you so much for your patience.

If you have any more questions, please do let us know and we would be more than happy to assist. Hope to see you around soon!



Decathlon Hong Kong Fitness Team



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The height of the material in between the upper and lower teeth is quite a bit. Even if it was set properly to my dentition, it felt uncomfortable after wearing it. Masseter muscles became sore after wearing it even if it was for a very short time.

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Hello Priya,

Firstly, I would like to thank you for taking the time to write a review of our product. It is because of your constant reviews that we are able to improve on our products and services and are able to cater better to your needs. 

I am so sorry that you had an unpleasant experience with 100 Boxing and Martial Arts Mouthguard Size L. I request you to please head down to any of our stores for an exchange or a refund. You could check also check out another model as this is for regular usage - 

If you require more assistance, you may contact us directly at 

Thank you,

Good product

Good quality and perfectly fit. Gives better protection for the teeth.

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Nice product

Easy to mould and perfect fit

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Don't Buy It

Melts while moulding

Dear Sir,

Thanks for sharing your feedback with us and we apologize for the experience you have had.

Normally the mouthguard needs to be dipped in warm water for up to 60 seconds and it is mouldable to a limit of 20 times. If it has not exceeded the limit maybe it is a genuine defect and a one-off case.

IIn this case you can exchange the product for a new one or collect a complete refund for the same. To initiate the process, you can write to or visit the nearest Decathlon Store to you.

Feel free to get back to me if you have any further doubts or queries.

Warm Regards

Debdatta Sen

Country Sport Leader

Cross Training & Body Building (India)

Okay product

Not comfortable

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Really nice

Good one

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Additional Product informations


Complementary parts

  • 100% Polypropylene

Main part

  • 100% Ethylene Vinyl Acetate


  • 100% Polypropylene

New, safer design

Our mouthguard complies with the new XP S72-427 standard which stipulates the following features:- Thicker to prevent perforation.- Built-in breathing channel so that you can breathe even when your jaw is closed.- Meshing of the upper and lower teeth to more effectively hold the jaw in place (protection against fractures).-A gum covering to stop the teeth from coming loose.

Which size should you choose?

S: User is 1.1 m to 1.4 m tall (CHILD)M: User is 1.4 m to 1.7 m tallL: User is over 1.7 m tall

Directions for use

Always wear your mouthguard during training sessions and competitions.To mould your mouthguard correctly, soak it in boiling water for exactly the amount of time it says on the instructions. This time will be indicated in the instructions and may vary from model to model. Watch the video tutorial to find out how to mould your mouthguard.To guarantee good protection, your mouthguard should stay in place when you open your mouth.

Care instructions

Wash in fresh water. Leave to dry naturally before putting it back in its storage box (original box).For optimal protection, replace your mouthguard at least once per year or as soon as it starts to show signs of wear.

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