The dog tag is made of 316L stainless fireproof steel. The tag is 2 mm thick, therefore, its strength and durability are guaranteed, since it cannot be bent or crushed without a serious mechanical impact. The tag comes fitted with a chain and clip which are made of the same quality steel. They don’t rust or leave traces on clothes or skin, nor do they turn black. The bumper is made of soft hypoallergenic rubber causing no skin reactions in prolonged use.