The new Flashbomb E7 Heat Seeker 4/3 Zip Free Wetsuit is our most technically advanced cold-water wetsuit. This season, we're combining our all new E7 Flash Lining through out the wetsuit and our unique Version 2 Flex Energy lining that generates even more heat when stretched. Along with added superior technical features, the Flashbomb Heat Seeker is our warmest and stretchiest Flashbomb yet.