The 19th version of the GEL-Kayano series has further enhanced upon its award winning ride, comfort, & fit. ASICS' flagship Structured Cushioning model drops over a half ounce in weight, thanks to top-of-the-line features like Heel Clutching System & Dynamic Duo Max. This legend's upper fit also receives special attention with strategically placed seamless overlay construction making the GEL-Kayano 19 the best in its history. What's New?: Dynamic Duomax The latest evolution in support has been introduced in the shoe with the multi-rigid shape of the new Dynamic Duo Max technology. Fans of the series will enjoy the same level of support & stability felt in previous models, while enjoying an ounce of weight savings over its predecessors Soft Top Duomax Heel Clutching System A final addition of the Heel Clutching System completes this magnificent update. This system removes the traditional internal heel components & replaces it with an exoskeletal heel counter. This provides a more comfortable heel fitting environment while decreasing the probability of friction or irritation Specifications: Shoe Category Stability Ideal Use Road Running Weight 310 grams Glossary: Impact Guidance System ASICS' design philosophy in which the individual components of the shoe work together resulting in a more comfortable step & an enhanced gait Rearfoot & Forefoot GEL Cushioning systems Silicone-based material placed in critical areas of the sole which dampens shock when the foot hits the ground allowing for a smooth movement through the step & reducing the risk of injury X-40 Comfor Dry Sockliner Insole placed inside the shoe which provides cushioning with anti-microbial properties keeping the foot drier & healthier Full Length Guidance Line Vertical flex groove in the sole running from heel to toe which encourages a more efficient running style Solyte Midsole Material Spongy layer between the sole & upper designed to absorb shock & cushion the foot. Solyte is a lighter material than Sp EVA & EVA & features enhanced durability Discrete Eyelets Independently placed eyelets where the laces pass through the upper which disburse lace tension improving fit & stopping possible irritation