Yaktrax Pro ice grips have stronger coils and a retaining strap which goes over the top of the footwear for extra security. The Pro is ideal for running or jogging on packed snow and ice. Runners in the Baikal Ice Marathon put Yaktrax Pro to the test running a whole marathon over a frozen lake in Russia. Often running on sheet ice, they were pleased with the grip and feel of Yaktrax Pro. Yaktrax Pro are perfect for outdoor workers who spend a long time working outside when conditions are icy underfoot.