The NFL has lightened up on their dress code this season, in part because of the success of the "My Cause, My Cleats" program, and that has extended to footwear -- at least before the game.
"They really wanted the opportunity to express themselves, to show their enthusiasm and passion for the game," NFL commissioner Roger Goodell said earlier this week during a question-and-answer session with Cardinals fans. "To frankly, show who they are as people."
It doesn't mean in-game cleats will look a lot different -- players must stick with black, white or a primary color of the player's team -- but during pre-game and warmups, players can show off cool designs they might have at their disposal.