This is a great basic brief made with Speedo"s known quality!Speedo"s PowerPLUS fabric brings added power, comfort and fluidity of motion - all while cutting weight and drag. Up to 50% lighter than traditional performance swimwear, PowerPLUS compression technology increases muscle support and elongation for added power and decreased recovery times. PowerPLUS also resists pilling, fits perfectly and retains its shape use after use. 79% Nylon / 21% Xtra Life Lycra Fiber