The SR77 WMD-Escape hood is designed for escape purposes only. It enables the users to escape from a fire or contaminated area. It is intended for once-use only and if unopened, the hood can be fitted with fresh filters every 7 1/2 years and be resealed for future emergencies. The hood is made of flame-retardant, chemical-resistant material. It is pre-assembled with a wide-spectrum filter for NBC, smoke and industrical chemical protection. This hood, from The S.E.A. Group, is vacuum sealed in a aluminum foil bag. It can be worn with eyeglasses and fits most faces without special adjustments.