Widely criticized for enforcing its ultra-strict uniform guidelines, the NFL is loosening the reins this weekend, celebrating its first ever #MyCauseMyCleats campaign. The initiative calls for players to compete in custom cleats representing a cause that they hold near and dear to their hearts — without the threat of a fine. In addition to bringing some extra flair to the field, players are standing up for issues such as domestic violence, cancer awareness, homelessness, animal rescue and police brutality. More than 500 players around the league are expected to participate during Week 13.

Ahead of kickoff tomorrow, we've rounded up the 100 best #MyCauseMyCleats customs shared on social media. It's nearly impossible to sort through every pair and there's still plenty left to be unveiled, but this is a pretty comprehensive rundown of what's been seen thus far.

Be sure to follow @SoleCollector on Twitter for #SoleWatch updates throughout the weekend.