My boys are 9 and 11 and both run and train for races. My one son after a 5k got chafing from his boxers and I realized they needed shorts made for running with underwear in them. These shorts from
Nike are perfect. They are lightweight and breathable with a comfortable running brief inside and my boys love them. Zappos had a variety of sizes and colors and they were delivered to my door the next day. Have bought a total of 6 pairs!