Hero image is getting stretched?

If you go to De'Yon's Jordans | Our Mission the top hero image (sneakers) is being stretched. I also notice if you stretch the bowser window wider the image stretches with it.
Originally, the image was fine then I hit something in the panel to make it stretch. How do I reset it? Thanks.

@drattray

I would suggest using size cover in this case for that image.