Abstract: The present invention pertains to an upper body garment that contains a mechanism which allows the user to adjust the bust size of said garment. Said mechanism would consist principally of a panel located generally below the armpit. A zipper would be located at the top of the panel under the armpit, at the location of the vertical seam commonly found on most upper body garments. As the zipper tab is lowered from the armpit, the strands of the zipper will separate and expose the panel. This action would gradually increase the amount of bust room available for the user.