The Imperceptor Vest was designed by Helena G. Wells and kept in a secret room of the H. G. Wells Museum in London. The vest was designed to give its wearer super speed, but Wells could never get it to work. However, after MacPherson un-bronzed her, he explained to her that anti-matter could power it, something that humans weren't aware of 100 years earlter. The file pertaining to the Vest retrieved by Claudia Donovan reads: After she returned from the Vault, Wells used the Vest to escape from the Warehouse and left it outside once its power source was depleted.