Brooks - T4 Racer (White/Yellow/Thorn/Black/Silver) - Women's: For the elite road racer who is looking to cover a lot of ground in a little time, the T4 is the high quality speed shoe of necessity. Its lightweight, flexible, fast and up to the rigors of distances up to a half marathon. Air mesh upper provides excellent ventilation and keeps the feet cool. Micro suede upper materials. 3M reflectivity increases nighttime visibility. Internal thermoplastic heel counter helps stabilize the rearfoot. EVA sockliner cushions the foot and enhances overall comfort. Slip lasted for a flexible supportive fit. Lightweight EVA midsole. Hydroflow ST, optimizes cushioning and stability. Crumple Zone configuration creates a smoother heel strike and allows a more natural gait. Engineered Hyperpod Technology for cushioning. Strobel Construction. Curved platform. Shoe weighs 5.9 oz.