DIY: C-Flap Install Tutorial Helmet Face Guard - YouTube
C-Flaps Becoming Commonplace Among MLB, Minor Leagues
Paul Lukas on Twitter: "Jason Heyward began wearing the C-Flap face guard attachment in 2013. There are no stats on this kind of thing, but he probably holds the records for wearing
The MLB's C-Flap helmet is saving faces on All Star at a time
C-Flap helmets may look weird, but MLB stars are picking safety over aesthetics - The Washington Post
Rawlings Mach One-Tone Matte Batting Helmet with EXT Flap - Left Handed Batter – Markwort Sporting Goods Online Store