The Mongrel SP>R or Rubber Sole range is a high-tech workboot that’s built to take the heat, no matter how rugged the conditions. It features a new light and flexible polyurethane midsole with a nitrile rubber outer sole and heavy duty 6mm tread pattern. Matched with our new Ortho - Tec PU innersole, the Mongrel SP>R range has been designed specifically for industries such as mining and heavy construction. - PU midsole with scuff cap Nitrile rubber outsole Heat resistant to 300 ̊C Kevlar stitched vamp Ortho - Tec PU innersole Tough - Sider sole technology Air - Zone comfort system Fully lined padded tongue and collar Steel toe-cap, Speed lacing D-rings Type 1 AS/NZS 2210.3.2009 class 1 Sizes 5-13 (6.5 -10.5) >New light and flexible Polyurethane midsole with a nitrile rubber outsole and heavy duty 6mm deep tread pattern >Heat resistant up to 300°C >New Tough - Sider dual density sole for extra shock absorbency >Proven Air - Zone comfort system >New PU inner-sole with inter-connected air-holes for cool comfortable feet >Roller Sole technology for ease of movement >Moulded PU scuff cap >Steel toe-cap