Wall Equestrian - Has your riding helmet expired? An equestrian ASTM/ SEI approved helmet should be replaced after it has been in a fall/ accident or five years from its manufactured date.
Helmet Care & Maintenance - Is Your Helmet Too Old? — Horse Serious
Is it Safe to Buy Used Horse Riding Helmets? (Watch Out!)
Discussions at Dover - A Blog for the English RiderDiscussions at Dover | A Blog for the English Rider
Safe or Sorry: How Often to Replace Horseback Riding Helmets
Riding Helmet Safety Standards Guide
Safe or Sorry: How Often to Replace Horseback Riding Helmets
7 Best Horseback Riding Helmets 2019 | The Strategist