Engineered Knit Upper - Improves ventilation to keep you cool and feels soft against the skin. Lacing System - Reduces the risk of irritation and creates a firm fit. Reflective - Increases visibility on low-light adventures. FlyteFoam Blast Plus midsole - For lightweight shock absorption and responsive energy return. PureGEL - Shock-absorbing, soft and bounce-back. Ortholite X-55 sockliner - Provides enhanced low cushioning