ARENA Powerskin Carbon Flex Jammer ARENA Powerskin Carbon Flex Jammer Featuring the world's most advanced technical racing suits, Arena's POWERSKIN Carbon Flex is the pinnacle of technology and innovation in competitive swimming. The Carbon Flex features added height and length in the rise, maximizing coverage, compression and comfort. Part of the Carbon Series, the Carbon Flex has a patented V-Flex System to provide maximum range of motion in the water because every swimmer is different.