Garmont Women's 9.81 Bolt Dl Trail Running Shoe 100% Mesh Rubber sole Multi-denisty Eva - Softer EVA at forefoot for sensitivity, firm lateral PU heel cradle for torsional stability Rebound midsole offers a 4-structured system blending comfort, shock absorption and compression set resistance Polymer Heel insert to absorb at heel strike and rebound forefoot insert Double lug pattern and aggressive profile are oriented to provide maximum traction and breakaing Double lug placement is ergonomic for an anatomic flex