Y3 Marathon TR Trainers in Off White. Initially debuted in 1979 as a trail running shoe, the Marathon TR has now been given a contemporary update by Yohji Yamamoto and the team at Y3. It arrives engulfed in suede with leather detailing and a leather lining, Y3's current seasonal application over raw exposed stitching makes up adidas' three stripes while further monochromatic branding spells out Y3 on the heel panel. Underfoot, Dellinger Web technology and an exaggerated trefoil grip pattern combine to offer the smoothest of rides.