More swimming medals have been won in Speedo than all other brands combined. Designed to provide more support and coverage than traditional briefs, Speedo Jammers are an essential style of competitive and fitness swimmers. What will you choose. Cut past competition in the pool wearing a technical jammer designed to improve your performance. Engineered from Endurance+ fabric with four-way stretch for shape retention and a chlorine-resistant finish for long-lasting style, this quick-drying bottom provides coverage and comfort. Endurance+: Our longest lasting and best-selling chlorine resistant fabric; retains colour and shape swim after swim Lightweight and quick drying - resists sagging, bagging, fading and snagging. Inner drawcord at waist for a secure and comfortable fit.