Essential Grid not responsive

I have an essential grid that is not responsive on this page: http://www.aptiondc.com/lookbooks

It is set on fullwidth masonry because I would like the grid to take up the whole page. The images are large I know but that is how we want to lay it out. Any other layout the photos get cropped.

Is there any fix for this? I tried changing the settings for different screen sizes in the essential grid settings but it did not help.