These undies are just like the Happy Seams briefs you know and love, but with a revolutionary planet-friendly update. What’s the same The lightweight feel, the seamless appearance, and body-hugging fit. What’s new They’re created with CiCLO® fibers, which are designed to behave more like natural fibers when they end up in the environment, helping them safely degrade in a landfill at a rate similar to a natural fiber as opposed to the estimated 200 years that it would take for most synthetic fibers. By choosing Better Briefs, you’re joining us on our journey to solve the problem of synthetic microfiber pollution.