ASICS S4 : r/RunningShoeGeeks,Asics S4 Full Review - After 200km,ASICS S4 Illusion Running Shoes 'Blue White' 1013A129-400,ASICS S4 Review | Running Shoes Guru,Asics S4, possibly a Japan exclusive edition made for runners who aim to complete a sub 4 marathon. It uses a dual density foam; FF BLAST TURBO at the top layer and