w/Quick Latch Drop-Down Feature Provides comfort and stability with a soft but firm silicone faceseal Resilient material extends product life Maintains its shape in high heat environments Overmolded, low-profile design simplifies cleaning and maintenance with fewer parts and crevices, and provides a wide field of view Valve cover design directs exhaled breath and moisture downwards, and facilitates a positive pressure seal check 3M (TM) Cool Flow (TM) Exhalation Valve enhances comfort by reducing heat and moisture, and allows for easier breathing Adjustable head harness assembly provides optimum fit and comfort with a three-size adjustable head cradle Quick latch drop-down mechanism allows for easy on and off as workers move in and out of contaminated areas - no need to remove your hard hat, eyewear or faceshield NIOSH approved