3M Half Facepiece Respirators 6000 Series, Reusable. Advanced silicone material provides a softer feel on the face • Unique adjustment design helps reduce tension and pressure points on the face for unsurpassed comfort • Adjusts easily so user has the option to wear the respirator in either traditional or drop-down mode • Valve design helps make breathing easier • Helps reduce heat and moisture buildup for cool, dry comfort • Use with 3M bayonet style cartridges and filters. Use with 3M bayonet style cartridges and filters.