Material Design Lite is a UI component library created with CSS, HTML, and JavaScript. It lets you add a Material Design look and feel to your websites. Besides, It doesn’t rely on any JavaScript frameworks and aims to optimize for cross-device use, gracefully degrade in older browsers, and offer an experience that is immediately accessible. You can use the components to construct attractive, consistent, and functional web pages and web apps. Pages developed with MDL will be able to support all the modern web design principles like browser portability, graceful degradation, and device independence.
The MDL component library offers new versions of common user interface controls such as buttons, text fields, and checkboxes, which follows Material Design concepts. The library also includes advanced and specialized features like cards, spinners column layouts, sliders, typography, tabs, and more. MDL is free to download and use, and may be used with or without any library or development environment (such as Web Starter Kit). It is a cross-browser, cross-OS web developer’s toolkit.
You can check Material Design Lite’s  GitHub.
Reasons to use Material Design Lite:
•	Created by Google, MDL is up to date, easy to use, has a wide feature coverage, and no external dependencies.
•	An important advantage is that MDL can be used with Elm, a language of graphical user interfaces.
•	MDL provides a great out-of-the-box look that may need no customization.
•	With their blogging templates, Material Design Lite enables you to get a blog started in minutes.
•	MDL provides a rich set of components, including material design buttons, text fields, tooltips, spinners, and many more.