O'Neill Epic 4/3mm Back Zip Wetsuit - Men's. 2023 O'Neill Cold Water Surf Wetsuit.The Epic has many of the same great features as our high-end wetsuits, including 100% UltraFlex DS neoprene, double seal neck closure, Lumbar Seamless Design (LSD) and re-engineered covert Blackout zipper. Clean graphics and sharp style line make the Epic the best value in the industry. Back Zip - Easy Entry. External Key Pocket with Loop.