One of the lightest stability training shoes out there. All the support none of the weight. Successor to the award winning MK3. The upper, utilizing SCOTTs Ergologic Fit construction, allows for maximum adjustability and comfort. In this up date the asymmetric lace construction has been completely re worked to offer even more medial support. The midsole is supported using a carbon midfoot bridge as well as a medial EVA post and features eRide Technology, resulting in controlled midsole deformation and more efficient foot function.