Facial seal
Available in thermoplastic rubber (BLS 5600) or silicone (BLS 5700 and BLS 5700/C).

Bayonet connection
This connection is very intuitive and allows a quick and secure attachment to the mask. It has a closure feedback that allows the user to tell whether the filter has been positioned correctly. The double filter offers better weight distribution on the mask and a wider field of vision.

New internal oronasal 
Made of soft but tough thermoplastic material; easy to dismantle and maintain.

Phonic membrane
An aluminium layer inside the breathing unit of the device (BLS 5700, BLS 5700/C) enables voice transmission.

Anti-condensation system
Designed to prevent fogging of the mask by controlling the flow of cold and warm air inside the mask and not with easily perishable surface treatments.

Scratch-resistant visor, optical class 1 (EN 166)
It provides a panoramic view without optical distortion. A vitrification treatment makes it scratch-resistant.

Six-point harness (Komfort)
Fixed on 6 attachment points, the BLS 5000 series harness guarantees extremely precise adjustment by evenly distributing the pressure on the face.

Available in three sizes
The models made of silicone (BLS 5700, BLS 5700/C) are available in three different sizes to perfectly fit all face types.

Compatible with

• BLS 200 Filters
• BLS 201 Filters