3M Half mask 3M, size LThe 3M Respirator Half Mask, size L with a dual filter system is designed for 3M 2000, 5000 and most 6000 series filters. This half mask provides a more balanced seal than a mask with one heavy filter in the front. The respirator reduces breathing resistance and improves the field of view during handling. The mask is made of a light, soft elastomer. The half mask uses a 3M filter bayonet clamping system for secure and secure filter attachment. With