Choose the right mask for your activities!

Reliable, comfortable, durable and reusable: The LeanMask is the mask that best suits all your needs, whether it is filtering or just a fashion accessory. In addition to the many advantages, our mask is 100% Made in Belgium, produced in an environmentally friendly way and easy to clean: simply wash it with soap and water, hydro-alcoholic gel or in the dishwasher. You only have to change the filter every day.

Discover our masks now:

Its main advantages

  • Protection & Security

  • Comfort

  • Breathability

  • Reusable

  • Easy to clean

  • Eco Friendly

  • Economic

  • For the whole family

  • MED Model: ATP Certified (with FFP2 filters)

lean-mask belgium flag

The durable reusable mask.
Made in Belgium.

LeanMask is reusable, recyclable and storable for future needs. It was entirely developed and produced locally by the company Weimat located in Eupen.

LeanMask is comfortable to wear and environmentally friendly.

« We cannot imagine the amount of waste produced by the masks thrown away every day in companies, construction companies, schools, hospitals, homes, offices, public transport, …».

Ingrid, HR manager at a large company.


  • FFP2 filters approved by

  • Mask approved by ATP
    (Alternative Test Protocol)

  • Mask approved by the
    German Institute for Sustainability and Economy

Discover LeanMask

The durable reusable mask. Made in Belgium.

  • content
  • filters
  • care
  • Certification
  • Each mask includes :

    • The soft plastic support for the mouth and nose. It is non-irritating to the skin.
    • The filter holding grid
    • The 2 adaptable fastening straps. The fastening straps are flexible, adjustable and can be worn in different ways:
      • behind the ears
      • horizontally with the 2 straps at the back of the head

    Only the filter (4 x 4 cm) needs to be replaced daily. The other components can be easily disinfected and reused.

  • Choose your filter between FFP1 and ATP certified with FFP2 filter.

    Our composite filters made of fibres are FFP1 / ATP certified with FFP2 filter.
    They are available in packs of 25.
    The filter must be replaced every day.

    Technical specifications of the filter DAY Technical specifications of the filter MED Certificate for the filter MED
  • LeanMask is washable with soap and water and can be directly reused. It can be disinfected with hydroalcoholic gel. Very practical, LeanMask can also be put in the dishwasher or washing machine. A version made of certified medical plastic is also available for specialized sectors and can be reconditioned by being put through sterilization machines found in hospitals.

    The filter holder
    The filter holder is made of PP and ensures that the filter rests securely on the side of the mask and is airtight.

    The filter
    The filter is FFP1 / ATP certified with FFP2 filter and is made of fleece. The only part of the mask that needs to be replaced daily.

    The mask
    Made of TPE, our mask can be used multiple times. Disinfect it or boil it. It’s done.
    The 2 fastening straps: Flexible and adjustable, they ensure that the mask fits comfortably while following the curves of your face.

  • Weimat has had LeanMask certified by the certification body of the German Institute for Sustainable Development and Economics. The use of LeanMask for wearing in close contact for the protection of others received a rating of “very good”.

    Quality of finish: 92/100
    Production process: 90/100
    Wearing comfort: 85/100
    Reusability: 98/100
    Constituent material: 98/100
    Resistance: 96/100
    Breathability: 99/100
    Reduction of the ventilatory flow rate: 98/100

    Download the certificate

What they think

  • I’ve equipped the whole family! We take it out in public places, to go shopping or take the bus. In the evening, I throw away the little filter and put all the masks in the dishwasher! Every morning, everyone leaves protected for a new day. I’m reassured.

    Marie and Jean

  • Every staff member received LeanMask when we were able to return to work. I wear it 6 to 8 hours a day. It is practical, light and easy to clean.

    Benoît, worker

  • We dentists didn’t wait for the Covid 19 crisis to wear masks. It is part of our daily lives. Having tried LeanMask, I have now completely abandoned the surgical mask for a comfortable, durable and environmentally friendly solution.

    Kathrin, dentist

  • I am a midwife and physical contact is an important aspect of my profession. I need and want to wear a mask. Especially since I do a lot of home visits. What I find great about the LeanMask is that I barely feel it. Sometimes I even forget that I’m wearing a mask.  And it’s reusable. It’s so easy to clean that it’s a big advantage. I feel safe with the LeanMask and have recommended it to my colleagues.

    Melina, midwife

  • In my practice, many people come and go. To protect them and myself, I have tried the LeanMask and I must say that I am delighted. It is very light and very comfortable to wear. I can breathe well in it and it is also easy to care for.

    Véronique, veterinarian

Weimat at the origin of LeanMask

Located in Eupen, the company Weimat was founded some thirty years ago by the father of Alex Weiss, the current CEO. Initially specialising in precision mechanics for the aeronautics industry, Weimat then moved on to the design and manufacture of moulds for plastic injection, specialising in small series and the manufacture of complex prototypes. 16 years ago, after training in the automotive tooling sector in Switzerland and Canada, Alex Weiss joined the family business of 5 or 6 people to develop it into an SME covering 6000 m2 and employing 45 people.

The company has diversified its activities in the OEM sector, the equipment manufacturers (for the most prestigious car brands) and has developed its expertise in precision mechanics. Some departments have been impacted by the Covid 19 crisis. These include precision mechanics but also tooling, moulding and injection moulding mainly for plastic car accessories. It is because these production lines have been slowed down and Weimat anticipated the future shortage of masks that the company quickly decided to start designing and producing durable masks made in Belgium.

Discover Weimat

Alex Weiss

“We converted two of our injection moulding machines to make them,” says Alex Weiss. We are able to react very quickly to changes in orders.

At full capacity, we could produce up to 100.000 a week.”


Contact us for any questions.

    Weimat Group

    Rue Haute 104/9
    B – 4700 Eupen

    Tél. +32 (0)87 74 30 41
    Fax +32 (0)87 552 820