The Forsheda A4 is a full-face respiratory system gas mask that protects the face, eyes, and respiratory organs. Features include an anti-fogging system, increased field of vision, and single-unit harness with customizable strap-and-buckle system.
Offers protection from chemical, biological, and radioactive hazards, including solid and liquid particles, bacteria and viruses, and and chemical and organic gasses. Meets NATO’s NBC standard.
Anti-fog and dual-air system
Specialized lens system made from high-strength stable polymer
Extra-wide field of vision range
Clear-speech exhalation valve
Fully adjustable 6-point harness for snug and secure fit
Civilian-friendly, minimal training necessary
Lightweight, foldable, and easy to store
Engineering and Features
Eyepieces: Polysulfone lens system fitted internally and externally for stability. The material remains rigid and transparent in temperatures from -100? to 150?
Anti-Fogging: The internal mask features a valve unit and sealing cover that provide additional anti-fog measures. The system is designed to guide air from the filter to the lenses before reaching the internal mask.
Internal Transit Frame: Designed for maximum shape maintenance
Harness: The single-unit head harness uses a 6-point system to ensure customizability and secure wear. Rear-panel is outfitted with elastic straps, each with their own buckle
8-10-second donning period
Works with standard NATO 40mm gas mask filter
Uniform standard Size 2 fits 95% of adults
Lightweight construction (440g)
Constructed of bromobutyl rubber materials; no second skin needed
Brand New Condition
Protection factor: >10,000
Protection against chemical warfare agents: >24 hour
Field of vision: 88%
Breathing resistance (without filter):
Inhalation at 25 P at 30 I/min, 75 Pa at 95 I/min
Exhalation: 130 Pa at 160 I/min
Carbon dioxide content: 0.65%
Materials: Bromobutyl rubber (frame), silicone rubber (inner mask and membranes), polysulfone (eyepieces), polypropylene (support frame), and polyester/polyamide/lycra (harness)