react-pure-grid gives you the power to customize every aspect of your grid system, while at the same time it has built in defaults which probably suits any project
The way I do is go to http://getbootstrap.com/customize/ and only check "grid system" to download. There are bootstrap-theme.css and bootstrap.css in downloaded files, and I only need the latter.
In this way, I can use the grid system of Bootstrap, with everything else from Material UI.