Tyvek paper is one kind of high density polyethylene material made by flash vaporization
method. The unique craft makes it light but extremely firm. Tyvek combines the
characters of paper, thin film and cloth. Relying on its unique physical characteristic,
Tyvek has already been applied in packing of desiccant successfully.

Features:
1) Remarkable permeability, but the liquid and the solid member are
unable to pass
2) Waterproof, guards against the dust
3) Non-toxic, harmless, pure neutrality, not mildewy