A – 100% Silk outer layer
B – 5 Layer replaceable high performance filter
C – 100% Silk inner layer
1 – Breathable Layer – Blocking the larger particles
2 – Electrostatic Filter – Filters .03 micron dust
3 – Activated Charcoal Filter – Absorbs airborne chemical filter
4 – Meltdown Layer – Additional filter to help block particles (.03 microns)
5 – Non-Woven Layer – Absorbs airborne chemical pollutants