Pure.CSS is small and responsive style sheet modules which are build on top of Normalize.css that provides the styling’s of layouts, HTML elements like buttons, tables, menus. This was originally developed by YAHOO. It was developed with mobile first concept with responsive elements which fits on all device sizes. Pure has produced the minified size of 4KB which fits all modules. Even you decide which module to use for you application so that the rest of the modules can be ignored and save the bytes.