The INFINITI TEK SPLIT TOE 5mm BOOT - New Gum sole on boot provides more traction than ever before. 5mm of pure warmth and flexibility for your feet. This wetsuit surf boot will have you tap dancing on your thruster in no time. Made for cold surf conditions. Thermospan lined upper boot for warmth Nylon-2 lined sole for traction Flex horizontal heel support Ultrastretch ankle panel with Pull Loop for Easy On and Off Solid Sole at split toe - No leash hangups Gripper Heel Sole Velcro cinch across instep