Basically, metal-free safety footwears are made of materials which are not metal. In typical safety shoes, toe-cap, midsole and D-ring are parts of the shoe which made of steel.
There are workplaces that are sensitive to metal, so workers are required to wear metal-free safety shoes.
Moreover, metal-free midsole is also more flexible then steel midsole.
Our metal-free safety shoes also meet EN ISO 20345 standard.