This is the highly cushioned high mileage road shoe for any neutral runner. Superior performance on both roads and treadmill. The Kinsei 4 pushes the boundaries of footwear science, with features such as I.G.S-Impact guidance system, design philosophy in which the individual components of the shoe work together resulting in a more comfortable step and an improved gait. Asymmetric Lacing Design-a lacing system that follows the curve on top of the foot in a natural way, to ensure a perfect fit and reducing the potential or irritation. Discrete Eyestay Lacing-Independently placed eyelets disburse lace tension, creating a customised fitting environment and enhanced upper comfort improving the fit and reducing the risk of irritation. Biomorphic Fit Upper- Stretchy material strategically placed on the upper which reduces bouncing when the shoe moves reducing the risk of blisters and irritation. Improving fit with enhanced performance. P.H.F-Personal heel fit, a special memory foam heel construction that guarantees a perfect fit around the wearers heel creating a personalised fit. Gel Cushioning System-Asics cushioning system is based on a special kind of silicone that enables optimal shock absorption. Gel units are strategically placed in the midsole and designed to enable specific functions and positions. Trusstic System-A plastic bridge under the foot arch which provides strength and stability without loss of flexibility. Also helps to control torsion, mimics the connective tissue in the foot by creating tension as the foot moves through each step. Guidance Line-Vertical flex groove decouples the tooling along the line of progression for enhanced gait efficiency. The Kinsei has the guidance line full length in the sole running from heel to toe. X40 ComforDry Sockliner-Insole placed inside the shoe which provides cushioning with anti microbial properties keeping the foot drier and healthier. Solyte-proprietary cushioning material that provides an exceptionally lightweight midsole with escellent bounce back and durability. Rearfoot and Forefoot Gel Cushioning System-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 and reducing the risk of injury. Heel Clutching System-Lightweight heel counter on the outside of the upper which provides improved support and fitting around the heel. Cuprotherm-Metallic film in the upper which retains heat in cold weather and releases heat in warm weather. The Gel Kinsei 4 is recommended for those who are neutral runners with little or no biomechanical problems and Underpronators, those prone to increased shock transmission through the lower limbs.