The X 17.3 features a techfit® upper, which requires zero wear-in time perfectly moulding to natural shape of your foot, while the speed skin exterior has been updated to create a smooth and sleek look. A sock construction provides a snug fit, while the heel lining extends up the ankle to ensure the foot is locked in place. The TPU outsole offers superior traction and grip on soft ground.Please note: To achieve the perfect fit, Pro:Direct recommend you go up half a size for the entire adidas X range.