Deebo Samuel wears a Nike Chinstrap Shield over his Riddell Hardcup chinstrap. Deebo is the only guy (that I’m aware of) that wears this specific chinstrap shield. He wears it in the red colorway (pictured) and sometimes a black colorway.
Nike Chinstrap Shields are simply an accessory you can put over your chinstrap. They are made from Nike’s dri-fit material and are built to keep your chin dry and comfortable.
You can shop the Nike Chinstrap Shield for $10 from Dicks.