ASICS Women's 33-DFA 2 Running Shoe 100% Synthetic Rubber sole AmpliFoam: Engineered to maintain durability at softer densities, providing better flexibility, comfort, and platform adaptability ideal for natural running FluidAxis: Anatomically correct deep flex grooves have been aligned to the joints of the foot ComforDry Lasting: This lasting material features plush underfoot comfort while providing excellent moisture management, high level breathability, and antimicrobial properties Solyte Midsole Material: A lighter weight midsole compound than ASICS' standard EVA and SpEVA. Also features enhanced cushioning and durability Seamless construction