Open Sesame Ring


Wearable technology that opens the door to Boston-area subways and buses at the touch of a finger. Invented by two MIT students who were fed up with missing their trains while fumbling for their Charlie Card subway passes.

Functions just like a standard Charlie Card. A perfect gift for the newly admitted student, your favorite MIT-wannabe teenager, or anyone who takes pride in MIT and rides the T!

The MIT logo version is exclusively available at the MIT Museum Store.

Clear selection

Boston-area MBTA only. Fares are additional, and must be loaded via regular Charlie Card procedures.

U.S. ring sizes: S≈6; M≈8; L≈9.5; XL≈11. Ring face: .6875in. square.
Manufactured using state-of-the-art 3D printing.


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