According to DIN EN ISO 20344:2011, DIN EN ISO 20345:2011, and DIN EN ISO 61340-4-3:2001, this product is classified as S1P SRC ESD. The upper material is made from RUNNEX® knitting technology, which includes seamlessly processed knitted fabric made of polyester. It features a breathable RUNNEX® AIRSTREAM functional lining in gray, a TPU cap, and a toe protection. The gray PU outsole has a puncture-resistant RUNNEX® soft PU midsole that is metal-free. This product is oil and fuel resistant, heat resistant up to approximately 130 °C, and non-chalking. It also includes a breathable, removable insole and has a width of 10.5. Additional color variants are 5107 black/green and 5109 black/blue, available in sizes 36 to 48 upon request. Other technical features include a steel toe cap and a PU midsole that comply with EN ISO 20344/20345 standards.