Moisture vapour permeable membrane. Perfect barrier to water, virus, bacteria and fungi. Acrylic, low allergy adhesive. Flexible PE plastic film is used to ensure a super-thin, flexible, washproof plaster.  The membrane is moisture vapour permeable, allowing the skin to breathe, without the need for physical perforations, keeping the adhesive securely in place, whilst acting as a complete barrier to water, virus, bacteria and fungi.  High-tech acrylic adhesive provides a really secure fixing but is skin friendly and low allergy.