Ten types of football helmets prohibited in the NFL
Here is a list of the NFL's prohibited helmuts:
SG Varsity, Rawlings Quantum, Schutt Vengeance Z10 (204100), Rawlings Impulse +, Rawlings Tachyon, Schutt Air XP Pro (789102), Riddell VSR-4 (R41133), SG 2.0, Rawlings Impulse, and Schutt Air XP (789002).
The NFL's helmet chart is linked here:
http://static.nfl.com/static/content/public/photo/2018/04/16/0ap3000000926653.pdf
Jeff Miller (pictured above) is the NFL's Senior Vice President of Health and Safety Policy. He said was " an important step for player health and safety."
According to Dr. Jeff Crandall, Chairman of the NFL's Engineering Committee, the helmut rankings are based on lab results from 35 different helmets:
Jeff Miller