Size: W6.5 Color/style: Silver Fern (Blizzard Sole) New bio-based SwiftFoam™ midsole is light, bouncy, and ready for distance running Breathable upper helps keep the air flowing for extra comfortable kilometres Heel counter and flared, geometric midsole help keep your stride steady More Bounce, Less Ounce. Go faster and farther with the new Tree Flyer. Lightweight, super springy, and wildly comfortable, this distance running shoe makes your extra efforts feel effortless. SwiftFoam Saves The Day. New high-performance midsole is big on cushion and energy return, making long runs easier on your body. Stability For Miles. External heel counter and flared, geometric midsole help keep your stride steady. Feel The Breeze. Lightweight, breathable eucalyptus fibre upper provides next-level comfort.