Continuity mistake: When Taggart shoots the pile of skin grafts, it explodes, covering him, Jack, and Jo in guts. There's nothing on Tag's shoulder at first, but after a couple of shots, there is now a slab of skin on his right shoulder.
Continuity mistake: When the toilet at the Sheriff's Office explodes, it slides out into the main office, with no smoke coming from it. Two shots later, it is now emanating smoke.
Continuity mistake: We see that there's a "Do Not Cross" hologram in front of Cafe Diem when Henry arrives to check things out. When the group leaves, the hologram disappears from the outside shot.
Chosen answer: It's basically just a type of suit that's made for whatever special project they're working on. No different than a lab coat, hazmat suit, fire coat, etc.