Skechers Speed Flex Trekker black composite safety work trainers shoes 200255ECSafety Category : S3S Marking Code : SR ESD Features Electro Static Dissipative Composite midsole Slip resistant Description Gear up with comfort and protection wearing Speed Flex Trekker. This slip resistant laced pull on features a ballistic nylon and synthetic upper with a non metallic carbon nano safety toe, an Air Cooled Memory Foam insole, and Goodyear Rubber Outsole Carbon nano non metallic safety toe front meets ASTM F2413 impact and