Escape hood SR 77-3 for self-rescue in the event of fire and/or chemical emission accident. Half mask with two exhalation valves. The Hood is flame retardant, and vacuum packaged in an aluminum bag. The aluminum bag gives a carefree use for 10 years with no need of service or maintenance. Filter can not be changed. Included: Gas filter SR 331-2 ABEK1-CO, particle filter SR 510 P3. and carrying bag.