JSP Typhoon 735 FFP3V Valved Moulded Mask (Box 10) The Spirotek by JSP range of Typhoon™ Moulded Masks are selection of masks covering a wide range of tasks. The whole range features our unique Typhoon™ Valve technology for extremely low exhale breathing resistance for CO2 emissions and heat build-up, and extremely low moisture build-up. The Spirotek by JSP range of masks conform to the EN149:2001+A1:2009 standard.