3M FF-400 Ultimate FX Full-Face Respirator

The 3M FF-400 Ultimate FX Full-Face Respirator gives you a wide field of view for excellent peripheral vision. NIOSH approved. Compatible with all bayonet-style 3M cartridges and filters (sold separately). Available sizes: S (for very petite adults, children), M (fits 80% of population), L (people with large head/facial features). These are guidelines to assist with your sizing decision. There is no easy way to spell out the sizing on these respirators. Size medium will fit a majority of men and women. Once you receive your respirator, make sure it fits properly and passes fit testing requirements before using.