I use this for running and the initial feel, when getting the shorts on, was great. But it ended there. The shorts are made of a too heavy material, especially since it is made of two pieces. The undershorts work great and entirely reduced my chafing, but the outer-shorts, once heavy with sweat, kept falling down off me, pulling the undershoots with them. I had to keep pulling my shorts up every 5 steps to avoid exposing my butt. The elastic band around the waist is very weak and when the shorts get heavy, it's game over. I can't imagine wearing these shorts during a longer race, where I need gels in my pockets and I sweat a lot. The shots have a tie string, but whatever it is made off is also a bad product because it gets untied all of the time.