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Polypropylene is a plastic polymer used as a material. In the context of a "belt," it refers to a structural component, likely a non-woven fabric or film, providing support or fit within a product, not an active skincare ingredient.
No specific concern data available
Safety summary
As a material, polypropylene is generally considered inert and safe for external contact. It is not absorbed by the skin and poses no known irritation or sensitization risks when used in this manner.
For informational purposes only. This is not medical advice. Always patch test new products and consult a dermatologist for skin concerns.