A super-thin insole tells doctors what’s wrong with your foot.

Sprained ankle. Meniscus tear. Shin splints. Ugly injuries, to be sure, but more often than not athletes–and their doctors–have trouble pinpointing the underlying cause. Germany-based Moticon is seeking to change all that with OpenGo Science, a new insole that fits discreetly in athletes’ shoes and delivers data to sports scientists. The ultra-thin layer is laden with sensors and can fit in any shoe.