Lightweight and breathable running shoes. - Brand: asics - Model: S4 - Color: Blue/White Thank you for viewing! These are the S4 running shoes, which are lightweight and have excellent cushioning! These shoes incorporate a plate and are designed for runners aiming for a sub-4 marathon time. I estimate I've used them for a total of about 100 kilometers, including one full marathon and training runs. I'm selling them because they don't fit my feet well, as they are thinner than the NovaBlast shoes I usually wear. Please examine the photos and consider that these are used items before purchasing.