Speedo Men's Swimsuit Geo Diamond Jammer Youth Adult. Style # 8051432 Color BLACK 001. New Jammer! Stretch, recover and repeat that's the basic idea behind Speedo's affordable ProLT. This fabric is the perfect choice for occasional swimmers and water lovers, providing support and comfort at a great value. Gender: Male Age: Youth to Adult Silhouette: Jammer Fabrication: 85% Polyester / 15% Spandex. Sizes: 26, 28, 30, 32, 34, 36, 38. Speedo Men's Swimsuit Geo Diamond Jammer Youth Adult.