Speedo Youth Solid Endurance+Brief Brief offers least coverage with most freedom of movement. Endurance+ is 100% chlorine resistant fabric designed to lasts 20 times longer than conventional swimwear fabrics. Four-Way Stretch technology also provides a body-hugging fit, great shape retention and soft comfort. Low Moisture absorption and quick drying. UV Protection 50+. Front gusset. =Fully lined - front & back. Inside drawstring at waist for secure fit. Speedo® logo on bottom front side. Fabric: 50% Polyester/50% PBT.