When sourcing blasting helmets, the most critical factor is compliance with international safety standards. You must ensure the product meets ANSI/ISEA Z89.1 for head protection and ANSI Z87.1+ for high-impact eye and face protection. For the European market, look for EN 14594 (Respiratory protective devices) and CE marking. Additionally, the helmet must be part of an NIOSH-approved respirator system if it is being sold in the US, ensuring it provides the necessary Assigned Protection Factor (APF) to protect workers from crystalline silica and other hazardous dusts.