NFL testing new protective face masks with surgical or N95
Michigan Wolverines adjust to new football helmet shield to combat
N.F.L. Becomes First Major American Sports League to Drop Covid-19
Face Masks Are Again in Short Supply as Covid-19 Cases Surge - WSJ
NFL unveils Oakley face shield intended to enhance COVID-19 safety
NFL, Oakley create coronavirus face shield for helmets
Lockdowns and face masks 'unequivocally' cut spread of Covid
New gear, practice methods: are football concussions decreasing?
Week 5 and 6: Composition of Helmets - BASIS Independent McLean