Our NIOSH-approved Fully Disposable Saran Hood is so unique, it is patented. Saran laminated Tyvek offers zero permeability to air and moisture, which is ideal for chemical handling and hazardous waste management. It's designed and constructed in one-piece, with the down tube and head suspension completely integrated. This eliminates the need for decontaminating of the down tube or replacement parts. The entire assembly is disposed of after use. This comes with Allegro's Low Pressure Flow Adapter, which allows the hood to connect to an ambient air pump or any low pressure air source.