A perennial favourite, the Nike Phenom Tights return with updated support and breathability. Areas of ventilation were placed using runner-informed data, helping you stay cool when your run heats up. This product is made from at least 50% recycled polyester fibres. Targeted Support:Data from hundreds of runners was used when creating these tights. On the upper portion, that data helped our designers place ventilation in high-heat zones and to make sure key muscles were wrapped for support.,Convenient storage:An expandable back pocket with a liner helps keep your phone dry. More benefits: Soft, lightweight knit fabric through the lower leg helps you move freely.Low-profile, elastic waistband with drawcord provides a customisable fit.