Dr. Martens: Heritage Ironbridge Steel Toe 8 Tie Boot(Adult Unisex)Safety Toe Cap offers protection from a minimum 200J impact and 15kN compression force. Dr Martens air cushioned sole for additional shock absorbing properties. Reduces the risk of slips and falls on hazardous surfaces. Meets or Exceeds ASTM F1677-96 (Mark ii Machine) a value of 0.25 as a safety margin for soilings tested on oily, greasy, icy, soapy or oily/wet surfaces. Will help protect the wearer against accidental contact with electrical charge by offering additional insulation from the ground.