Focus | BLS 5000 b-lock: full-face mask with double filter
BLS 5000 b-lock full face mask with bayonet connection ensures complete protection, breathing comfort and panoramic vision.
BLS 5000 b-lock device is a full-face mask with double filter designed to offer high standards of safety, stability, breathing comfort and optical quality, meeting the needs of professionals working in complex industrial environments.

What are the main features?
Wide, distortion-free field of view
The lateral configuration of the two filters significantly improves the operator's field of vision. The filters are positioned further back so as not to obstruct downward vision, a fundamental requirement in industrial, maintenance and technical environments.
The result is a wide, unobstructed field of vision, which increases:
- precision in movements
- operational safety
- comfort during detailed activities
This configuration ensures greater comfort and natural movement.
In addition, the Live Visor panoramic visor, made of scratch-resistant polycarbonate, offers a wide field of vision without optical distortion (optical class 1), ensuring a clear and accurate perception of the surrounding environment. Distortion-free vision reduces visual fatigue and improves awareness of the surrounding environment, contributing to the overall safety of the operator.

Breathing comfort
The dual filter system incorporates two inhalation valves, one for each filter, increasing the overall airflow capacity. Thanks to a larger filtration area, the airflow is distributed more efficiently, with tangible benefits:
- reduced breathing effort
- greater comfort
- improved tolerability during prolonged use
Furthermore, the air recirculation system inside the mask is designed to ensure effective anti-fogging, a critical requirement for a device that we know can be particularly challenging to use.

Greater stability and excellent fit
The presence of two filters allows for a more balanced distribution of weight across the entire mask, improving stability during use. A stable mask:
- does not tend to slip down
- stays in place on the face
- ensures better facial adherence
These aspects also have a positive impact on the outcome of the respiratory mask fit test, ensuring an effective seal over time.

The correct fit of the full face mask is also guaranteed by the Multi-Fit System, which means that the BLS 5000 b-lock is available in three different sizes, allowing it to adapt to different facial shapes.
This translates to:
- improved seal
- increased comfort
- reduction in pressure points
- improved performance in fit testing
A mask that fits perfectly to the face ensures more effective protection and a superior user experience.

Available models
The series offers 3 different models
| Model | Material | Available sizes |
|---|
| BLS 5600 | TPE | U |
| BLS 5700 | Silicone | S/M/L |
| BLS 5700/C | Silicone | S/M/L |
The silicone version, which is extremely soft and comfortable, also offers the advantage of a high-efficiency sound membrane to facilitate communication. Finally, it is equipped with a practical strap that allows you to carry it easily over your shoulder.
Compatible with
This range of filters is also compatible with the BLS 4000next Series half masks, both silicone and thermoplastic versions.
Why choose this series?
BLS 5000 b-lock series is an advanced solution for those looking for a full-face mask combining:
full respiratory protection
structural stability
reduction in respiratory effort
distortion-free panoramic view
adaptability to all face types
It is not just about filtration, but a system designed to optimise safety, ergonomics and operational performance.
Go to the product page BLS 5000 b-lock series to download the technical data sheets and find all the details you need.