Also known as: ガンツスーツ
The protective suits characters wear in Gantz. Issued to each player by the mysterious black ball, a Gantz suit makes the wearer super-strong and almost invincible -- until it (quite literally) runs out of juice. The way the suits hook together is designed for maximum fanservice, as is the fact that they're skintight (it's mentioned in the reference material that you can't wear anything under them).