New Holland Agriculture Blue Cab 4 Technology (T4F) 

The NEW Blue Cab 4 technology provides cab Level 4 protection from dust, aerosols and vapors for the ultimate protection during spraying applications.
Blue Cab 4 has an exclusive double filtration system that provides Level 2 protection until the operator chooses to engage Level 4 protection and meets both EN 15695-2:2009 filter and EN 15695-1:2009 pressurization standards for operator protection.
Found in New Holland T4F Narrow Series tractors; learn more here: agriculture1.ne...