Unisex ASICS Hyper MD 8 Size:US M4.5 W6 Bevelled Heel offers soft Bevelled Heel offers soft and effortless transitions from heel to toe Semi Straight Last means more foam through the midfoot giving ingrained stability through every strideOUTSOLE High Abraison Rubber Zones enhance durability whilst minimising weight Full Ground Contact gives inherent stability and relaxed transitions from heel midfoot to toe Proprietary Carbon Rubber blend gives great blend of durability and traction UPPER New Engineered Mesh upper gives increased breathability whilst retaining ultimate comfort Reinforced eyestays provide improved durability and support where it's needed most Lightweight Mesh gussets stop tongue movement and slippage Heel counter locks down heel and gives extra versatility for orthotics Memory foam collar gives enhanced comfort extended up under the heel for greater reactivity Weight: 174g Best for: Track Middle Distance (400m