Reebok Men's Premier Trinity 6 Running Shoe 100% Mesh Rubber sole Nylon mesh upper with PlayDry lining - to provide the ultimate in support, breathability a Multiple Kinetic Fit System (KFS) expansion zones in the upper allow the shoe to adapt and DMX midsole in forefoot - for cushioning, comfort and feedback with DMX Shear to the heel Dual density medial post - to help slow down the rate of overpronation. Transition bridge - maintains midfoot integrity (allows natural independant rear and foref