It's the week that includes giving Tuesday and also the week that the NFL allows its players to give back by relaxing the rules about footwear, allowing players to wear any color cleats this weekend, provided they are for a cause.

FOX's Chris Hoenig reports:

Wide receiver Terrance Williams is one of three Cowboys players that will raise money for Flint's water crisis:

(Williams) "Show that you care by putting on your shoes is like a national stage where you can have a chance to show why you support people."

While teammate Jason Witten is raising awareness for domestic violence survivors:

(Witten) "Stand up and speak out. No more domestic violence."

Others are supporting their own personal foundations, including Saints quarterback Drew Brees and Vikings linebacker Anthony Barr:

(Barr) "What I'm trying to do is provide these single mothers opportunities to further their education."

The NFL is vetting each cause. Players will auction their cleats after this weekend's games, donating the proceeds to the charities of choice.

Chris Hoenig, FOX News.

Follow Chris Hoenig on Twitter: @Chris_Hoenig