TYVEK® Classic Xpert Superior Protection. DuPont TYVEK® material offers superior protection when it matters. That’s why Dupont have been leaders of the Type 4, 5, 6 protective coverall market in Europe for the past 20 years. TYVEK® Classic Xpert is the latest generation of Dupont’s most advanced product for Type 5/6 protection. It offers 6x more protection against airborne particulates than the previous generation and 10x more than coveralls made of microporous film. It also provides 3x more liquid protection than coveralls with conventional stitched seams.