adidas Primeknit is carefully engineered to naturally expand with your foot while you run to give you a more comfortable fit and help reduce irritationLightweight synthetic upperSnakeskin print with glow-in-the-dark and reflective elementsSock constructionTORSION® SYSTEM for midfoot integrityADIWEAR™ outsole offers the ultimate in high-wear durability; Continental™ Rubber outsole for extraordinary grip in wet and dry conditions