This is the O&';NEILL EPIC 4/3MM BACK ZIP FULL WETSUITFeatures: Back Zip Wind-Proof Smoothskin Double Super Seal Collar External Key Pocket with Loop UltraFlex Neoprene FluidFlex Firewall Glued and Blindstitched Seams The Epic has many of the same great features as our high-end wetsuits, including 100% UltraFlex Neoprene, double seal neck closure, LSD (lumbar seamless design) and re-engineered covert blackout zip. Clean graphics and sharp style lines make the Epic the best value in the industry.