The adidas Adizero Boston 13 (Model JS4945) pushes the envelope for super-trainers. With 13.8% more Lightstrike Pro foam than the Boston 12, it delivers a softer, more responsive ride without sacrificing durability. The midsole combines Lightstrike Pro (for cushioning & bounce) with Lightstrike foam and embedded ENERGYRODS to guide your stride and reduce energy loss. The engineered textile mesh upper ensures breathability, while added padding at the tongue and collar improves comfort. New LightTraxion outsole design with Continental™ rubber in high-wear zones offers solid grip and long life. With ~37 mm heel stack and ~30 mm forefoot, and a 7 mm drop, this shoe is ideal for serious runners who want speed plus training versatility.