Jp-genuine via Ebay offers 50 PCS Disposable Face Mask 3-Ply Non Medical Surgical Earloop Mouth Dust Cover for $2.99 +Free Shipping.

Product Description:

A disposable 3-Ply face mask for use of general purpose infection control. When worn properly, it will help to reduce the potential exposure to harmful bacteria and bodily fluids. 

• Three layer filtration system for protection against harmful bacteria and fluids. 
• Leak-proof, Anti-Droplets, Antibacterial 
• Each Box comes with 50 pieces of face masks.
• One size fits all, for adult use.   
• This is a single use product, do not reuse. 
• This is a non-medical mask, for personal use in a general environment only.