ASICS Men's GEL DS Trainer 21 Running Shoe 100% Synthetic Imported Rubber sole Rear foot and forefoot gel cushioning systems attenuates shock during impact and toe-off phases, and allows movement in multiple planes as the foot transitions through the gait cycle Dynamic duomax support system this evolution of duomax system enhances stability and support, with reduced weight and increased platform support Solyte midsole material a lighter weight midsole compound than asics' standard ethylene vinyl acetate and vinyl acetate also features enhanced cushioning and durability Propulsion truss tic mimics connective tissue in the foot by creating tension as foot enters propulsion stage Propulsion Trusstic Mimics connective tissue in the foot by creating tension as foot enters propulsion stage