"Instructions for use: Before first use and after every 8 hours of use, it should be washed and dried using a heat source (hair dryer or tumble dryer) to reactivate the water repellent component. Washing temperature 60 degrees Washing time: 60 minutes Do not use bleach To dispose of the masks you should dispose of them in the grey bin for domestic waste. Never in the yellow bin. We have used the Swiss HeiQ Viroblock antiviral technology as the final coating of our masks. This technology, tested by leading European laboratories, neutralises the action of germs, viruses and bacteria by 99.9% within a maximum of 10 minutes. HeiQ viroblock NP J03 has been proven to be 99.9% effective within 30 minutes against SARS-COV-2, the virus that causes COVID-19* "MJ (2020) Report on Viral Stability and Persistence of SARS-COv-2 on Treated Material. Doherty Institute for Infection and Immunity, Australia". "