Allegro Tyvek maintenance free hoods are used to cover the face and head to allow clean breathing air to be directed to the worker. They feature one-piece construction with an integral down tube & head suspension for eliminating the need for decontamination of replacement parts or breathing tubes. These poly-coated DuPont Tyvek hoods provide excellent resistance against hazardous chemical splashes and have a multi-layer sound dampening system made of foam, to resist crushing or twisting during use. These NIOSH compliant hoods come integrated with co-polyester lenses for distortion-free, panoramic visibility.