The ST53 combines Avon Protection's FM53 mask technology with an advanced modular breathing apparatus to provide positive pressure SCBA and/or PAPR capability for specialist operations.
 
Developed with the unknown elements of a threat scenario in mind, the ST53™ is the most advanced CBRN respiratory solution on the market.  It enables a fast response to changing operational conditions in one complete modular system.
 
A switch between negative (filter) and positive (SCBA) pressure is achieved at the flick of a lever on the front of the mask. And by attaching a short (ST53SD) or long duration compressed air cylinder, it is possible to enter a location on filter mode, assess the situation and change to SCBA mode if the need arises.

Compact Demand Valve (CDV)

• 1st breath activated for “instant on”
• Rugged, compact design delivers high flow rates
• Screw-on-design allows for DIN 40 thread
• With the option to mount on either side of the mask, it is unobtrusive and allows excellent integration with weapons and other personal equipment.

Gauge & Whistle

• Located on shoulder straps for easy access
• Positioned for high noise environments and easy gauge reading
• Illuminated gauge for low-light situations

Stealth Appearance

• Black low profile design
• Lightweight compared to traditional SCBA units
• Silent operation for critical missions

Comfort

• Ergonomically contoured backframe for comfort
• Adjustable harness allows for quick donning / doffing
• Padded shoulder straps for comfort

Click here for ST53 Brochure

Weight for ST53 units (based on empty cylinders)