Constructed of a soft BREEZE™ fabric that allows you to breathe freely: up to 250% greater than other masks. Remarkable filtration efficiency of 99% at 0.1 µm. Super high-filtration fluid-resistant mask: Offers a PFE of 99% at 0.1 µm. Exclusive DELNET® film forms a "moisture barrier" to repel fluids. Soft tissue inner layer keeps you cool and comfortable and provides breathability. Hypoallergenic and not made with natural rubber latex.