How often should I replace my child's ski helmet?

Replace a youth helmet immediately after any significant impact, even if no damage is visible — the EPS foam liner compresses permanently and cannot protect the same way twice. Otherwise, replace the helmet when your child outgrows it (typically every 1–2 seasons for growing kids), or after 3–5 years of use as the foam degrades over time. Inspect the helmet at the start of each season for cracks, loose components, or degraded foam.