This is a gel mask cover that eliminates gaps in the mask.
Reduces the leakage rate of typical non-woven masks by approximately 60% (compared to manufacturer's test results).
It comes with a storage bag, so you can quickly wear it when you are worried about crowds. Size (mm): 82 x 236
Quantity: 1 piece
Material: Crystal gel (thermoplastic elastomer)
Usable temperature range: -10 to +60°C (not autoclavable)
