Level 3 surgical masks — the highest ASTM fluid-resistance rating. ASTM Level 3 is what dental offices, medical clinics, and procedures with splash risk call for, and this is the strongest value on it in Canada: our Canadian-made ASTM Level 3 masks from $8.99 per box of 50, and Level 3 BFE 98% masks from $6.99 per 50 — a fraction of typical distributor pricing, with case-of-40 options for practices. All are 3-ply with comfortable ear loops and supplied under Health Canada MDEL #17341 for your compliance file. Need respirator-level protection instead? See our N95 and CA-N95 lineup. Fast shipping across Canada from our Ontario warehouse.