MBT Women's Jambo (Le) Athletic Walking Shoe fabric 100% MBT Certilogo Authenticator Verified Tag on every pair. Axis The unique & functional part of the midsole is the pivot axis underneath the midfoot, which promotes active rolling movement with every step. Contoured Polyurethane Insole. BASF PU Insole for excellent comfort. The soft MBT sensor produces what has been described as a pleasant feeling, reminiscent of walking on a sandy beach. The lasting board and the engineered shank combine to form one section. This is produced from the fusion injected dual density TPU, specially developed for the MBT sole construction which provides comfort & support.