Rupert Kirch experimented with notum threads in various types of armor. To be able to use them in kevlar armor, he had to remove 50 of the 640 layers that normal kevlar consists of. However, the notum threads benefit the user with a weak type of expansive energy shield, so the protection is generally the same. The vest was Kirch's own favourite piece of clothing, because it's light and chill. It could unarguably have given better protection, but its augmentations make up for that lack.

Rupert Kirch experimented with notum threads in various types of armor. To be able to use them in kevlar armor, he had to remove 50 of the 640 layers that normal kevlar consists of. However, the notum threads benefit the user with a weak type of expansive energy shield, so the protection is generally the same. The vest was Kirch's own favourite piece of clothing, because it's light and chill. It could unarguably have given better protection, but its augmentations make up for that lack.