The Speedo Men's Solid Endurance Brief is ideal for training and recreational use. It is made with 50% Polyester and 50% PBT materials, and can withstand repeated exposure to pool chemicals without fading, stretching, or degradation. It is made with an environment friendly fabric, and offers an improved fit with comfort and a softer feeling. It is quick drying and is 20 times more color resistant than standard swimwear fabric. It also includes an interior drawstring that gives a secure, body-hugging fit and minimal coverage for better range of motion. 100% chlorine resistant fabric. Four-way stretch technology, lined front and back, has front gusset for added comfort and provides 50+ UV protection. Brief offers the least amount of coverage with the most freedom of movement. Leave behind your old swimwear and put on the awesome Solid Endurance Brief from Speedo.