Upper: Brown Nubuck. Construction: Cement. Lining: Heavy Duty Nylex. Insole: Removable “VGS Motion Sensor” Dual Density Polyurethane Footbed with Memory Foam. Midsole: Compression Molded EVA with Impact 300 Gel Heel Insert. Shank: Engineered Composite. Outsole: VGS 300 Traction Rubber. Special Features: 100% Non-Metallic, ASTM F 2413-05 M/I/75/C/75 COMPOSITE SAFETY TOE, Electrical Hazard.