The Endurance 8cm Mens Black Briefs is made from Speedo Endurance swimwear fabric. Designed to last longer, Endurance is a 100% chlorine resistant fabric. The Endurance 8cm Mens Black Briefs is quick drying and engineered to retain its shape, swim after swim. In addition Speedo Endurance swimwear fabric offers 20 times more fade resistance than conventional swimwear fabrics and improved snag resistance. Endurance is exclusive to Speedo Swimwear.