Roboto Flex
Google Fonts · Christian Robertson · 2022

Roboto Flex is a highly sophisticated variable font offering an unusually wide range of axes for precise typographic control.
About
Beyond standard weight and width axes, Roboto Flex exposes parametric axes that allow designers to adjust individual stroke elements independently, making it a powerful tool for responsive typography and design systems requiring fine-grained optical adjustment. It is particularly valuable in advanced web and app contexts where variable font capabilities can be fully exploited. The breadth of its axis space also makes it useful as a research and demonstration tool for variable font technology.
Classification
Roboto Flex is an extensive variable font implementation of the Roboto family offering a vast axis space including weight, width, optical size, and several parametric axes. It represents one of the most technically ambitious variable font releases on Google Fonts.