Demos Grid system

A very exciting yacht race.
This uses a mobile first approach with 5 breakpoint. It only loads images as each breakpoint matches.
HTML
<img src="img/yacht_race@fallback.jpg"
srcset="
yacht_race@mobile.jpg 320w,
yacht_race@wide-mobile.jpg 480w,
yacht_race@tablet.jpg 768w,
yacht_race@desktop.jpg 1024w,
yacht_race@hires.jpg 1280w"
sizes="90vw"
alt="A very exciting yacht race.">
Credits
Author: Andreas Klein / @ixisio