Helmets have come a long way since leather hairnets, or even more minimalist than that, the perfectly coiffed head of hair. While EPS foam has dominated helmet construction for decades now, a new crop of technologies have emerged in recent years to address the types of forces your brain is likely to encounter during a crash.

Tech editor Dan Cavallari traveled to New York City in early 2019 to find out more about Bontrager's Wavecel technology. He sat down with Wavecel's inventor to find out what makes this green, wavy plastic different than other green, wavy plastics we've seen before.

And Jens Voigt chimes in with some of his experiences with head injuries and the evolution of helmets in the pro peloton.