All items are non-returnable. Designed to aid defence against the spread of infection. It makes no assurances that it can prevent transmission of infection of disease or viruses. It is not a medical or clinical face mask and as such should not be used for this purpose. It should not be used under any circumstances where infection level is high and in any exposure to high level heat sources or combustible substances. Remove and do not use mask if you are suffering with breathing difficulties or skin irritation. It is recommended that you wash this product before use.