ASICS Women's GEL Super J33 2 Running Shoe 100% Leather and synthetic Imported Rubber sole Fluid axis: anatomically correct deep flex grooves have been aligned to the joints of the foot. Rear foot gel cushioning system: attenuates shock during impact phase and allows for a smooth transition to midstance. Solyte midsole material: a lighter weight midsole compound than asics' standard eva and speva. Also features enhanced cushioning and durability. Seamless construction: the use of seamless materials reduces the potential for irritation and friction caused by traditional stitches and seams.