Merrell Men's Mix Master Aeroblock Trail Running Shoe Trail Running ShoeTrail Running Shoe 100% Textile, Synthetic Imported Synthetic sole 4mm heel-to-toe drop Metatarsal shock absorption plate Aeroblock Running Shoeprotective fabric upper EZ Clean finish Float lightweight midsole Mix Master shock absorption pad Merrell offers a minimal running experience with the comfort and protection of light cushioning and shock absorption features.