Troy Polamalu was one of the most instinctive and explosive safeties in NFL history, a two-time Super Bowl champion and 2010 Defensive Player of the Year whose uncanny feel for the game made him impossible to prepare for. This Riddell Speed Flex Authentic helmet, draped in Pittsburgh's storied black and gold, has been personally autographed by Polamalu and inscribed with "HOF 20" to mark his enshrinement in the Pro Football Hall of Fame. It's a striking tribute to one of the most unique and feared defenders the game has ever produced.