Made from the most durable and flexible fabric from TYR, Durafast Elite, the SQDUS7A uses a high-denier poly fibre and an innovative circular knit construction to combine the strength and colourfastness of polyester with the comfort of spandex.Offering reduced coverage on the legs and a compressive fit for less drag, the Durafast Elite Square Leg can withstand over 300 hours of use while providing a comfortable fit on your body and is 100% chlorine resistant.