Quick latch provides an easy on and off option as you move in and out of contaminated areas. Extended product life due to resilient silicone facepiece material. 3M™ Bayonet Connection is compatible with all 3M cartridges and filters. Simplified cleaning and maintenance with fewer parts and crevices. Includes the 3M Cool Flow™ Valve that enhances comfort by reducing heat and moisture. Keeps its shape in high-heat environments. 3M™ Quick Latch Rugged Comfort Half Facepiece Reusable Respirator 6502QL combines comfort, durability, and stability. The proprietary quick latch design offers an easy, one-hand touch drop-down mechanism for putting the facepiece on and/off while moving in and out of contaminated areas.