Nike Dri-Fit Technology - Is an innovative fabric technology designed for great moisture management in hot conditions. Flat-lock Seams - Reduce any rubbing or chaffing that regular seams can cause meaning a more comfortable fit all round. Back Zip Pocket - To store small items such as keys, money or a small snack bar. Reflective Element - For keeping you safe in low light conditions. Elastic Waistband - For a great fit and comfort.