You'll love the breathable flexibility of adidas adiZero Boston 5 TSF running shoes. With boost™ technology, these shoes deliver excellent energy return and superior cushioning to propel each step you take. Perform more consistently with reliable comfort.Upper: Tirrenina synthetic suede overlays provide added support. Coolever mesh upper offers heat management and enhanced performance. Flat laces reduce irritation. Mesh provides breathable flexibility.Midsole: Coolever mesh lining allows for superior moisture and heat exchange between the foot and the outside air. Midfoot TORSION® SYSTEM provides stability and propulsion throughout the midfoot phase of the gait cycle. Boost™ midsole provides unmatched energy return and superior cushioning.Outsole: adiWEAR™ heel outsole provides superior grip and durability while maintaining light weight. Continental Rubber on the forefoot outsole delivers 21% more traction in dry conditions and 23% more traction in wet conditions.