Speedo Men's 825764H Solid Jammer Shorts Swimsuit, Navy SPEEDO PowerFLEX Eco Solid Men's Jammer Swimsuit Turn up the dial on the competition with the sleek, speedy Speedo PowerFLEX Eco Solid Men's Jammer. The performance-enhancing PowerFLEX Eco fabric offers four-times the compression of traditional fabrics for enhanced support and propulsion in the water.