Find the best respiratory protection device for you!

BLS Genius allows you to easily identify the respiratory protection filter that best suits your needs.

By searching for a chemical or CAS number in the database, you can get more information, such as the CAS number or substance name, synonyms, chemical formula, recommended protection filter and corresponding BLS product.

In the "favorites" section, you can also save your searches and consult them whenever you need them.

In the "best sellers" section, however, you will find the BLS products that have so far been more successful on our customers.

For more information, contact us: |

App Privacy

The developer, BLS s.r.l., has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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