From ASICS:
Three years of development and 300 prototypes have led to the most advanced cushioning technology ASICS has ever made in our new Dynaflyte(TM) shoe. The groundbreaking FlyteFoam(TM) midsole is approximately 55% lighter than the industry standard. Built-in reinforced memory fibers instantly return to their original shape, providing the perfect combination of lightness and protection so you can fly over any distance. Weight: 9.3 oz. Heel Height: 20mm. Forefoot Height: 12mm. Weight: 9.3 oz. Heel Height: 20mm. Forefoot Height: 12mm.
This pair was tried on once / virtually brand new in box.