6pcs Rectangle CPAP Replacement Filter Cotton Respirator Particle Dust Filter For M/P Series (4.2 X 2.2cm)

Effectively filter PM2.5 fine particles, make sure you get clean air when using the respirator.

Filter cotton is equivalent to a protective barrier, can prevent particles in the air from entering the respiratory tract through tube and mask.

Ultra-fine filter cotton, mild and non-irritating, good filtering effect.

Important accessory for respirator, effectively extend the service life of the machine.

Light weight and in small size, easy to carry and install on machine.