• Filter specification: More than 90% of filtration efficiency. Tested with NaCl aerosol at inhalation flow rates of 95 liters/min with a particle size of 0.6 micron.
• Remove filter before wash / Filter is not washable / Wash mask often / Hand wash
• Cotton bag and a spare filter included
• Made in Britain with care
PLEASE NOTE: this is not a medical grade face mask. Once the protective poly bag is unsealed masks or filters cannot be returned or exchanged for hygiene reasons. The UK government advises that face masks should not be worn by those who may have breathing difficulties whilst wearing it.