NFL players don Guardian Caps, designed to protect from concussion
49ers training-camp report: Reuben Foster's shoulder 'will never be good as new.'
49ers training camp: Arik Armstead, Reuben Foster star
49ers: Padded practices start , but don't expect big hits of old NFL
What's with padded helmet caps teams are wearing
49ers News: Pads come on today - Niners Nation
Why are NFL players wearing padding on helmets at training camp?
49ers news, Day 11 recap: The offense is firing on all cylinders, as Trey Lance and Trey Sermon have big days - Niners Nation
49ers training camp: Kyle Shanahan says Brock Purdy had 'no arm troubles' after returning from UCL surgery
49ers Stop Training Camp Following Team Brawl
The good and not so good from 49ers training camp: Day 4