NFL stars like Dak Prescott are mixing things up in the NFL with cleats specially designed to benefit charities of their choice.

The “My Cause My Cleats” initiative is a brand new turn for the NFL, and is allowing players to wear customized cleats to support their favorite charity. Football players have a great reputation for doing community outreach and volunteering and even setting up their own charitable foundations, and this whole week celebrates that.

According to ESPN, more than 500 players will be wearing custom cleats to highlight causes important to them.

Some of these players have very personal connections to their causes as well. Dak Prescott, the quarterback for the Dallas Cowboys, will be wearing a pair of cleats in support of colon cancer prevention. Prescott’s mom, Peggy Prescott, passed away November 3rd, 2013 after an extended battle with colon cancer.

Greg Olsen, a tight end for the Carolina Panthers, will be wearing a pair of cleats representing The HEARTest Yard. The foundation helps families that have children with congenital heart disease. Olsen’s own son, T.J., was born with congenital heart disease and has since been helped by this foundation.

In November 2014, Kansas City Chiefs safety Eric Berry was diagnosed with Hodgkin’s Lymphoma, a cancer which develops in the white blood cells. Berry was out for the season, but was cleared after seven months and was on the field a short time after that. His cleats were designed to spread awareness about leukemia and are marked by a purple ribbon.

These players are only a handful of those supporting great causes that have had an impact on them and those around them.

At the end of Week 13 of the NFL season, every cleat will be auctioned off and 100% of the proceeds will go to the specific charity the cleat was supporting.