MARATHON TECH SHOES RETRO TRAIL-RUNNING STYLE PAIRED WITH MODERN TECH. The 1979 Marathon TR was adidas' first trail shoe. This update of the shoes puts a futuristic spin on that vintage style by pairing the archival upper with a Boost midsole. The more energy you give, the more you get. The upper has a mix of suede and mesh for a breathable feel and textured look.