Successor to the award-winning MK3. One of the lightest lightweight stability trainers on the market. Built on the same platform as the MK4, but with a different Ergologic Fit upper and 2nd density for more medial stability. The midsole is supported using a carbon midfoot bridge and features eRide™ Technology, resulting in controlled midsole deformation and more efficient foot function. Low profile and its AeroFoam midsole is around 25% lighter than traditional EVA foams.