The Scan Viper S1P Safety Trainers Size 11 has a lightweight and breathable flyknit upper, 200-joule steel toe caps and penetration-resistant steel midsoles. Fitted with a dual-density PU outsole, this cushioned sole ensures high levels of comfort. There is also an energy-absorbing heel that maintains comfort over long periods. The fuel and oil-resistant, SR-rated slip-resistant sole increases wear safety, making these trainers ideal for tradespeople.