Validate Steriled to a 10-6 S.A.L. The CC20 Series of DuPont™ Tychem® Hoods provide a wide variety of simple, effective and economical options for on-the-job respiratory protection. The result is better protection, improved productivity and greater comfort that combines to produce the best value on the market. These headtops are available as a hood or loose-fitting facepiece in a CC20 Series Airline Respirator configuration.