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The standard, versatile Airstream powered helmet with TH2P protection.

• Lightweight, durable powered helmet with all the benefits of the AH1, but with a higher level of respiratory protection (TH2) and a continuous face and head seal
• Comfortable, integrated head, eye and respiratory protection
• Flip-up visor allows retention of head protection when respiratory protection not required
• Supplied with polycarbonate visors with medium energy eye impact and molten metal protection (EN166:B)
• Choice of 5 hour or 8 hour batteries

Optional accessories extend the useful areas of application:

• Scratch-resistant and solar-tinted visors
• Radiant heat kit including aluminised snood, neck cover and heat-resistant visor
• Shaded acetate, heat-resistant triacetate and extended polycarbonate over-visors

AH4 may be converted into a HT-701 modular headtop for use with any of the modular air-sources