The Speedo Core Solid Brief is made of Lycra Xtra Life a fibre that is engineered to last 5-10 times longer than ordinary spandex. It provides resistance to suntan lotions, skin oils and chlorine better conventional swimsuit fabrics. It resists sagging and bagging, keeping its fit and looking newer longer. As well, a 9-thread Flatlock seam technology ensures a better fit. The low-profile Speedo Core Brief is front-lined, offering minimum coverage for maximum freedom of movement, with a non-slip drawstring at the waist. This brief embodies the quality and performance of Speedo's Core range.