Glide through the water with the Speedo PowerFLEX Eco Solid Youth Brief. The performance-enhancing PowerFLEX Eco fabric is good for the environment and even better for swimmers. Using 100% preand post-consumer nylon yarn, the Econyl fibers offer a revolutionary, eco-friendly composition that works with the Xtra Life? Lycra to last up to 10 times longer than standard fabrics.