The lightweight Gel Kayano offers a perfect mix of ultimate structured cushioning as well as a moderate level of support making it excellent for runners with mild Pronation-those who have a predisposed inward rolling motion as the foot progresses toward toe off and more severe Pronation-those who have an exaggerated inward roll and poor shock attenuation. 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. Space Trusstic-an advanced system that creates a pocket between the Trusstic sysytem and the midsole, allowing for greater midsole deformation and more efficient foot function. AHAR+-a thinner lighter version of Asics High Abrasion Resistant rubber. It is placed on heavy contact areas of the outsole to reduce wear. 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. X40 ComforDry Sockliner-Insole placed inside the shoe which provides cushioning with anti microbial properties keeping the foot drier and healthier. Removable Sockliner-A sockliner which can be removed to accomodate a medical orthotic. 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. Solyte-proprietary cushioning material that provides an exceptionally lightweight midsole with escellent bounce back and durability. Guidance Line-Vertical flex groove decouples the tooling along the line of progression for enhanced gait efficiency. Heel Clutching System-Lightweight heel counter on the outside of the upper which provides improved support and fitting around the heel. 3M Reflective-reflective material that enhances visibility when light is poor. Soft Top DuoMax-a next generation DuoMax system which provides greater comfort and enhances gait efficiency.