From DC Database
Flash's Costume Ring
Flash's Costume Ring is a small ring with a spring-loaded opening. Barry Allen, the second Flash, used this ring to compress and conceal his costume while operating in his civilian identity. By thumbing a small stud on the side, the top of the ring opened, releasing the costume, allowing Barry the ability to change clothes at super-speed.
Wally West, the third Flash, also uses one of these rings. Barry's grandson, Bart Allen used a similar ring to hide his costume while he was the Flash, and one to house his Kid Flash costume.
- Green Arrow used the ring given to him by Barry Allen as a gift when he proposed to his longtime girlfriend Black Canary.
- The Flash has shown the ability to vibrate and compress his molecules to actually hide himself inside of the ring when the situation calls for it.
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