A charge from a battery-powered ring he wore on his finger caused the fabric to release the extra hydrogen and shrink into the ring.
He later revised the process, making the fabric sensitive to nitrogen instead.
Wally's original costume was later transformed into a new yellow and red design with which the Flash had been toying, following an accident with a matter-transforming machine.
As Kid Flash, Wally wore this costume for many years until he outgrew his teenage appellation and became the new Flash, exchanging it for the outfit originally worn by Barry.
He decided to sit down and recollect his thoughts at a diner.
A passing waitress accidentally spilled the items of her tray onto Barry, who amazingly caught them all in mid-air and returns them to the tray.
All of a sudden, almost in answer to Wally's wish, the freak accident that gave Barry his powers repeated itself, this time covering Wally in electrically-charged chemicals.
Now possessing the same powers as the Flash, Wally at first donned a smaller-sized copy of Barry Allen's Flash costume, with the Picture News dubbing the young crime fighter 'Kid Flash' in a headline.
The Flash offered to answer all of Wally's questions, so Wally asked how the Flash had gained his powers of super-speed.
All of a sudden, a bolt of lightning streaked through a window, shattered a chemical cabinet and covered Barry in the electrified chemicals. However, the taxi started to pull away without noticing him.
Barry sprinted after it, only to run straight past it as if it had been standing still.
Deciding to use his powers to help humanity, Barry designed a special costume.
He used a special cold cast polyester he developed in college, which could be molded into miniature outfits from liquid material, that, when submerged in a special liquid, became sensitive to hydrogen, expanding on contact with the hydrogen in the air.