They are super-cool, but don't confuse them with an EMU (Extravehicular Mobility Unite) which is what gets used on a spacewalk.
In an EMU they have a full PLSS (portable life support system) in a backpack. That's part of why those weigh 300lbs.
They are designed to keep the astronauts safe in case of depressurization, while allowing them the dexterity to operate the spacecraft.
No. Wait.