Focus | BLS 4000next: the semi-mask with bayonet connection

BLS 4000next series reusable half-masks are available in silicone or thermoplastic rubber. Used in combination with quick-connect bayonet filters, they protect against gases/vapours and toxic particulates.

BLS 4000next B-lock reusable half-mask is a innovative solution for respiratory protection in industrial environments. Thanks to innovative features and ergonomic design, this half-mask provides safety, comfort and ease of use and maintenance.

What are the main features?

Lightweight and Comfortable Facepiece
The reduction in the thickness of the oronasal has allowed a 25% reduction in the weight of the half-mask compared to the previous version, making it one of the lightest on the market. Available in two materials: thermoplastic elastomer (BLS 4000next R) and silicone (BLS 4000next S), it offers an optimal fit for different facial types.

To find out which of the two materials best suits your needs, read the dedicated article on our blog: SILICONE or TPE: differences and advantages

Drop-Off System

The new front mask with quick-release coupling/uncoupling system and sliding elastics allows the half-mask to be removed and lowered without removing the headboard, facilitating breaks and improving operating efficiency

B-Lock bayonet connection

BLS' B-Lock system ensures quick and secure filter attachment, with tactile feedback confirming correct positioning. The dual filter design ensures balanced weight distribution and a wide field of view, improving ergonomics during use.

Ergonomic head harness

The slim, lightweight headband with quick adjustment ensures excellent compatibility with other PPE, such as goggles and helmets, providing comfort and safety during prolonged use.

Quick and easy maintenance

The half mask can be disassembled and reassembled in less than a minute, making cleaning and maintenance easier.

To find out more about all the product features watch the video on youtube

Available models

BLS 4000next series is available in different configurations to meet the specific needs of users.

Reusable half-masks

BLS 4000next R: made of thermoplastic elastomer, available in sizes S/M and M/L.
BLS 4000next S: made of silicone, available in sizes S/M and M/L.

Pre-assembled Kits (Industrial)
For immediate use, pre-assembled kits with different types of protection are available.

BLS 4100next S kit with protection A2P2 NR
BLS 4400next S kit with protection ABEK1P3 R
BLS 4500next S kit with protection P3 R
BLS 4600next S kit with protection A2P3 R

Why choose this series?

• Superior comfort: thanks to its lightweight design and high-quality materials, the half-mask offers exceptional comfort even during long periods of use.

• Ease of Use: the B-Lock system and drop-off mechanism simplify daily use, increasing operational efficiency.

• Simplified Maintenance: the possibility to quickly disassemble and reassemble the half-mask facilitates cleaning and maintenance operations.

• Compatibility with other PPE: the ergonomic and adjustable headpiece ensures perfect integration with other protective equipment.

Compatible products

BLS 4000next half mask is compatible with the following filters:

• BLS 200 filters: offer protection against toxic gases, vapours and particulates

• BLS 201 filters: flat filters for effective protection in contaminated environments.

Do you know which protection is best suited to your sector?

Find out more by downloading our free Safety Guide.

Visit the BLS 4000next product page to download the data sheets and find all the details you need.

Contact us for more information