Non-metal. Certificates in Category II according to current regulations EN ISO 20345:11. S3: Waterproof leather, resistant to water penetration and absorption. Extra wide last. Fiberglass safety toe cap >200 J. Textile anti-perforation insole >1100 N. Removable black insole. Padded interior lining in micro perforated blue. Bellows and padded tongue in textile material. Exclusive Bellota sole, bi-density in black. Resistant to oils, hydrocarbons and abrasion. Comfort zone: cushioned, shock absorption in the heel area. Ground contact area: greater grip and resistance to wear.