(CNN) — Crack! The sound of football helmets colliding on the field is an audible sign that fall is just around the corner. But that sound also comes with a darker side. Mounting scientific evidence ...

Guardian Caps are a brand of soft-shell helmet covers that slip over a helmet's hard plastic shell. Five universities have published studies on Guardian Caps since 2023. Only one study focuses solely ...

NFL uniforms have been marked by a distinct piece of equipment in recent years. Helmets have changed markedly over the years. The past was defined by leather-bound helms caked in brown and stitching.