ASICS Men's Gel-Super J33 2 Running Shoe 100% Synthetic Imported Rubber sole Shaft measures approximately 2.5" from arch 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