Most band-aids are made of plastic. The adhesive sheet of a band-aid is usually made from either PVC, polyethylene, or polyurethane. It is a single-use plastic item, but unlike other single-use plastics, band-aids can’t be replaced by a reusable item. Polyurethane is, like all plastics, petroleum-based and is the same toxic compound found in chemical-laden mattresses.

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