The 3Mâ„¢ 6500 Series Rugged Comfort Reusable Half Mask Respirator is designed with tough and dirty work sites in mind. The 3M 6500 Series delivers comfort, durability and stability with a firm, lightly textured silicone faceseal and strong body construction. Manufactured to EN140. Long-lasting stability & durability. Rugged comfort. Adjustable head harness assembly. Quick latch drop down mechanism for easy removal without disturbing other PPE. Low profile, easy maintenance design. Silicone face seal. 3Mâ„¢ Cool-Flowâ„¢ valve provides a cooler, more comfortable wear. Supplied without filters.