ICEBUG running shoes are available with 3 uniquely different traction technologies. RB9X® – Rubber 9 Extreme is our latest rubber compound development, and it sets a new standard in providing friction. Lab tests (SATRA) show that RB9X® outgrips the competition, but still matches the durability of an asphalt running shoe. In the real world, that means much more reliable traction in wet and slippery conditions and on challenging surfaces like rocks. OLX® - Fixed studs, when slipping is not an option. We have set the standard for studded footwear and now OLX® continues this for trail running, OCR, and Orienteering. Made of carbide steel, which is 6-7 times harder than normal steel, these studs are virtually impossible to wear out. BUGrip® is the name of ICEBUG’s grip technology for the most slippery conditions. A BUGrip sole is made of a special rubber compound and has 15-19 integrated steel studs.