Designed for running, training, and yoga, our sweat-wicking Challenger Shorts keep it light and cool with a relaxed fit that helps you get the most out of your movement. They are geared for more than just running—with a comfortable pocket that won't irritate when you move from the track to the gym. * The recycled polyester used in Nike products begins as recycled plastic bottles, which are cleaned, shredded into flakes and converted into pellets. From there, the pellets are spun into new, high-quality yarn used in our products, delivering peak performance with a lower impact on the environment. * In addition to reducing waste, recycled polyester reduces carbon emissions by up to 30% compared to virgin polyester. Nike diverts an average of 1 billion plastic bottles annually from landfills and waterways.