Void of All Links, Dyes & Chemicals. Outer White Fluid Resistant Layer. Inner White Cellulose Layer. Extra Softwill not Lint, Tear, Shred. High Breathability. High Efficiency Filter Media. PFE = 98% @ 0.1 micron- ASTM Level 3 Ultra Sensitive Mask, White, Latex Free (LF), 50/bx, 10 bx/ctn (4/cs, 18 cs/plt)