This will replace 28 current in service SCBAs. When firefighters go into a burning structure, confined space, or hazardous environment, they carry the SBCA on their backs to have safe breathing air while inside a harmful atmosphere. This keeps the firefighters alive. The new SCBAs have the newest and up-to-date features with buddy breathing capabilities, so if a firefighter runs out of air or has a malfunction, the SCBAs can be linked together so the firefighter can get out safely.