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TFS page 20

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The joke in that last panel is specifically for my buddy who works in IT security

EDIT: The thing Mark is putting on now is called a breather collar. It contains the air purifiers and regulators, batteries, and circulation fans required to maintain a proper breathing mix inside the helmet itself. Up to three oxygen tanks can be secured to the front of the device. The batteries also supply power to the MC-P's heaters. The diaphragm inside the collar fits snugly around the wearer's neck creating an air-dam that prevents the helmet's atmosphere from bleeding off into space; or worse inflating the MC-P, which would render it rigid and immobilize the wearer. It also prevents the helmet from shooting off the wearer's head like a champagne cork.
The straps under his arms are only there to keep it from shifting around on his shoulders; they shouldn't be under any real strain.

A spacer will occasionally wear just the collar if entering a pressurized environment that does not contain a circulating atmosphere and the helmet would obstruct mobility. The fans will keep air circulating near the mouth and nose so the wearer does not risk breathing the same depleted air.

Description
TFS page 20

next
previous
first

The joke in that last panel is specifically for my buddy who works in IT security

EDIT: The thing Mark is putting on now is called a breather collar. It contains the air purifiers and regulators, batteries, and circulation fans required to maintain a proper breathing mix inside the helmet itself. Up to three oxygen tanks can be secured to the front of the device. The batteries also supply power to the MC-P's heaters. The diaphragm inside the collar fits snugly around the wearer's neck creating an air-dam that prevents the helmet's atmosphere from bleeding off into space; or worse inflating the MC-P, which would render it rigid and immobilize the wearer. It also prevents the helmet from shooting off the wearer's head like a champagne cork.
The straps under his arms are only there to keep it from shifting around on his shoulders; they shouldn't be under any real strain.

A spacer will occasionally wear just the collar if entering a pressurized environment that does not contain a circulating atmosphere and the helmet would obstruct mobility. The fans will keep air circulating near the mouth and nose so the wearer does not risk breathing the same depleted air.