Tyvek® 400 cleanroom hood. This cleanroom hood has serged seams and an elastic face opening. The hood is pullover and is shoulder length. The hood is universal in size and is packaged 100 units per case.Tyvek® 400 is a unique, nonwoven material comprised of heat and pressure bonded polyethylene filaments. Resistant to penetration. Tyvek® 400 is a highly effective contamination control fabric. It is chemically and biologically inert, low linting and static-free unless it is laundered.Reduces unnecessary fabric bulkOffers optimum particle containmentAccommodates work positions common in cleanroomsSERGED SEAMMarginal ContainmentCost EffectiveWith Proper Processing, Assurance of Sterility.