Altra Women's Paradigm 2 Running Shoe 100% Synthetic Imported Rubber sole Increased Reflectivity Improved Upper Design and Durability Dual-layer EVA midsole with A-Bound top layer 5 mm Sculpted Insole.The instinct runs slightly short in size. if you are between sizes please go up to 1/2 size larger than your regular size. Foot-Shaped Toe Box accommodates toe splay