adidas Men's a3 Megaride Running Shoe 100% Nylon mesh Rubber sole The MegaRide gives the runner the feeling of being propelled through every foot strike and has a smooth, dymic ride adiPRENE2 insert for forefoot propulsion and efficiency; full-length a3 TPU plate for dymic cushioning Revolutiory a3 structured cushioning system The MegaRide gives the runner the feeling of being propelled through every foot strike and has a smooth, dynamic ride adiPRENE2 insert for forefoot propulsion and efficiency; full-length a3 TPU plate for dymic cushioning