Nano-silicon Mask - 3D Design – Antibacterial Effectiveness 99.9% even after 50 washes – Super eco-friendly: 100% combed cotton. Washable & Reusable. The solution for the environmental catastrophe that is disposable masks – SGS and Intertek Labs certified quality Packaging – Read Nano-silicon Mask Introduction Click here to read more – Read Nano-silicon Mask Q&A Click here to read more – Read Nano-silicon Mask Lab Tests Click here to read more Catalog Inner Card (placed inside packaging) Comparison with other masks What types of customer?