New Balance Men's MT10V1 Minimus Trail Running Shoe 100% Synthetic/mesh Imported Vibram sole Shaft measures approximately Low-Top" from arch Acteva midsole. This shoe runs small. We suggest ordering a half size larger than your usual NB size Antimicrobial treatment to reduce odor , Vibram outsole with flex grooves gives stellar traction and durability on rocky trails 4 mm drop - due to variances created during the development and manufacturing processes, all references to 4 mm drop are approximate Odor-resistant treatment to reduce odor