Without researching it, I would guess it's for safety. Kind of like how you can go rock climbing without a rope, but you're going to train with a rope to avoid any accidents.
It's kind of funny that your questions imply they lack the technology to make a self-contained suit.
Without researching it, I would guess it's for safety. Kind of like how you can go rock climbing without a rope, but you're going to train with a rope to avoid any accidents.
It's kind of funny that your questions imply they lack the technology to make a self-contained suit.