Joining edges of a mesh

Hi all I have a shirt model that I am convwering deom button down to a polo shirt. as it is constructed now, the mesh overlaps to make the center of the shirt. I can move the verts to line/up but how do I join them together tomake 2 verts into 1 in the same spot.

thanks
TIM

Along the bottom of the 3d view are buttons to change snapping modes (you’ll want verts) and to enable Automerge / Welding. You can also press W while hovering over the 3d view and select Remove Doubles to clean up any remnant overlapping vertices.