100% Non-Metallic, with protective toecap, midsole and internal metatarsal guard, Monzonite is highly robust and developed with specialist durability materials including FORCE10 Components, a Sympatex Moisture-tech Waterproof Membrane, IMPACT SHIELD and R-TEN Thread. It features a No. 8 YKK Side Zip for convenience. EN ISO 20345:2011 S3 HI WR M HRO SRC