This combination air supplied air purifying respirator is designed for use in adequately ventilated areas with at least 19.5% oxygen. Featuring a unique, switchable exhalation valve, these units are well suited for abatement work. Available in constant flow and pressure-demand versions.

MSA Torus Blast Hood Assembly, Series: Duo-Flo™, For Gas Type: Oxygen, Specifications Met: NIOSH Approved

• Fresh air respirators for use in adequately ventilated areas
• Requires at least 19.5% oxygen for use
• Features a switchable exhalation valve
• Air supplied mode permits long service use
• Air purifying mode is for entry, egress and moving from station to station in a contaminated atmosphere