Cut through the waves with the powerful Speedo Core Solid Swim Briefs. Low-drag profile offers less coverage and maximum freedom of movement. PowerFLEX Eco fabric: â¢ Made from 100% regenerated nylon from pre- and post-consumer waste. â¢ Retains shape up to 10X longer than traditional swimwear. â¢ 4X more compressive for enhanced mobility in and out of the water. 9 Thread Flatlock Technology provides an enhanced fit. Elastic waistband with inner drawstring. Logo detail at left hip. Main: 78% recycled nylon, 22% Lycra spandex; Lining: 90% polyester, 10% spandex. Hand wash, line dry. Imported. If you're not fully satisfied with your purchase, you are welcome to return any unworn and unwashed items with tags intact and original packaging included.