A special podcast about helmets used by NFL players, and what a crucial time this is for combatting head trauma in the league.

Diving deep into some revolutionary changes about helmet technology, including a trip to Seattle to tour a new helmet manufacturer, VIcis. Peter King learns how Vicis, just six years old, has made the safest helmet in the space three years running with its CEO Dave Marver, and converses with Vicis investors Russell Wilson and Doug Baldwin about what distinguishes the Vicis model. Also: conversations with NFL officials and 49ers tackle Joe Staley about the state of the helmet today, as the NFL tries to make a violent game safer for the head.