All SUPER SEAL filters are independently tested at Nelson Laboratories, Salt Lake City, Utah, U.S.A.
The filters are tested for a variety of tests including
All results of these tests can be found below.
Style Seal – 12% Spandex/88% Polyester
Umbra / Penumbra – 20% Spandex/80% Polyester (Prints and White)
16% Spandex/80% Polyester (Orange)
All Models – Tyvek (Flashspun high-density polyethylene fibers. Tyvek is a registered trademark of DuPont.
Ear Loops – 12% Spandex/88% Polyester
Inner Layer – Spunbond polypropylene
Nosepiece – Coated dual aluminum wire
Exhalation Valve – Base and cover are polypropylene, valve membrane is silicone.