PU foam earplug,reusable, linked with a PP ... LINKED WITH FOLDING HEAD FASTENERColour:Yellow / BlackDescription :Polyurethane foam earplugs, reusable, linked with a polypropylene folding head ... or occasionally. Packed in individual box.Materials:Polyurethane foam and polypropylene head fastener.Weigth : 15 gInstructions for ... , notably regarding ergonomics, innocuousness and confort PU foam earplugs