3D printing advances on-field protection for football players - Make Parts Fast
Riddell and Carbon® Produce First-Ever 3D Printed Football Helmet Liner
EOS and BASF 3D printed designs awarded $1.37m NFL Helmet Challenge funding - 3D Printing Industry
This Football Helmet Crumples—and That's Good
This Football Helmet Crumples—and That's Good
NFL concussions: Cardiff Uni to develop helmet padding - BBC News
Detroit business Xenith wins $496,500 to help improve NFL helmet safety
NFL awards $1.37M to helmet design contestants - DEVELOP3D
The KAV 3D Printed Bike Helmet on Kickstarter
Liquid nanofoam lining bolsters football helmets against repeat impacts
Protective helmets make sports safer
Shapeshift 3D Boosts Safety and Performance with 3D-Printed Helmet Lining
The future of football helmets is driven by innovation and a startup culture - The Athletic
How Helmets Have Evolved to Prevent Football Concussions - Chester County Hospital