The Riddell Speedflex helmet has been the go to since 2014. The safety features and the unique design made it popular among the players. Now, we may be seeing the next helmets to reign supreme in the NFL for the next 10 years or so.
The Riddell Axiom helmet has started to be worn in practice by JJ Watt, Budda Baker, and Ezekiel Elliott. The helmets definitely have a weird look to them, but they have a similar safety rating to the Speedflex. The Axiom helmets also allow the player to have a better peripheral view than the Speedflex which is a huge advantage to the player.