Upper: Synthetic. These safety sneakers are much lighter than traditional work shoes. The widened steel toe won't pinch your toes while resisting impacts of up to 220J. Lining: Mesh. The highly elastic mesh upper material has excellent ventilation properties and can absorb sweat well to keep your feet dry and comfortable at all times. Insole: Rubber Sole material: Rubber. The Kevlar midsole is highly puncture resistant and can effectively prevent possible injuries during work. The non-slip rubber outsole allows these safety shoes to adapt to all work surfaces. Heel type: Flat Heel height: 2.5 centimeters Shoe width: Normal Closure: laces. The air cushion can effectively absorb the impact of walking or pressure on the foot when standing, providing all-day comfort. These safety shoes are ideal for construction sites, factory workshops, warehouses, farms, hiking and outfits