When sourcing from an open helmet factory, the most critical factor is compliance with regional safety standards. For the US market, DOT (FMVSS 218) certification is mandatory. For Europe and many international markets, ECE 22.06 (the latest, more stringent standard) is required. If you are targeting the Brazilian market, INMETRO certification is necessary, while AS/NZS 1698 applies to Australia. Always request valid test reports from the factory to ensure the helmets meet impact absorption and penetration resistance requirements.