Regardless of the helmets I try, bicycle, motorcycle, all of them have at least one hard spot I could live without it. So a conforming inner shell will D3O would do magic for that. Username May 27 ...

By Dennis Thompson HealthDay ReporterWEDNESDAY, May 28, 2025 (HealthDay News) — Motorcycle helmet laws save lives and prevent many severe injuries, according to a new head-to-head study ...