Ari Edelson, artistic director of The Exchange, conceived of the subscription pass that provides individuals with four show credits that can be used to attend works by each of the participating companies.

The credits can be used toward four tickets to one performance of a particular show, or for one ticket to each of the four productions. The Xpass also allows for other flexible combinations that permit users to share credits with one another.

Each four-credit pass is $85. Individual tickets for all four shows would total $130. An iPhone application is also set to launch that will include additional program materials, behind-the-scenes information, multimedia and nearby restaurants.

Shows available on the Xpass include The Civilians' In the Footprint (Nov. 12-Dec. 11 at the Irondale Center); The Talking Band and Taylor Mac's The Walk Across America for Mother Earth (Jan. 27-Feb. 13, 2011, at La MaMa); The Rude Mech's Method Gun (March 2-13, 2011, at Dance Theatre Workshop); and the Exchange production of Ronan Noone's The Little Black Dress (April 28-May 29, 2011, at the Theatre at St. Clements).

To purchase the Xpass visit Xpass or phone (646) 224-5977.