The Monzonite is arguably the most robust high leg Internal Metatarsal Guard boot available in Europe, if not the world. 100% Non-Metallic, developed with specialist durability materials including FORCE10Â® Components, an Activ-TexÂ® Membrane, R-Tenâ„¢ thread and Impact Shield Technology. â€¢ Protective fibreglass toecap, composite anti-penetration flexi-midsole and internal metatarsal guard â€¢ Premium American black full grain waxy leather â€¢ FORCE10Â® components including scuff cap and outsole used for incredible durability â€¢ Waterproof and breathable SympatexÂ® Moisture-Tech membrane â€¢ No. 8â€™ YKKÂ® quick release extreme side zip â€¢ Manufactured to exceed EN ISO 20345:2011 S3 HI CI WR M HRO SRC Why Rock Fall? Second Generation Family Business delivering Safety Footwear excellence since 1997. Designing the largest range of specialist styles from size 2-16 built for Longevity, Comfort and Compliance. Over sixty trusted styles from Foundry to Coldstore, Office to Offshore, Electronics to Rail.