Adidas Boston 12. Size 7M or 8W Worn for ~75 miles. Tread still in good condition. Minimal impact on the cushion of the shoe. Lots of miles left to give. Good especially for someone who wants to try out this shoe without paying full price! The Adizero Boston 12 Shoes are built for mid- to long-distance running. They bring a race-day feel to training with a propulsive feel that comes from the glass-fiber infused ENERGYRODS 2.0, which limit energy loss underfoot. They're fast, but that does not come at the cost of durability — the midsole layers ultra-light LIGHTSTRIKE PRO cushioning with a new version of durable LIGHTSTRIKE 2.0 EVA. Lightweight mesh upper. Textile lining. ENERGYRODS 2.0 limit energy loss. Lightstrike Pro cushioning. Midsole drop: 7 mm (heel: 38 mm / forefoot: 31 mm). Continental™ Rubber outsole. Upper contains a minimum of 50% recycled content