O'Neill Youth Epic 4/3mm Back Zip Fullsuit Wetsuit 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. Back Zip Entry System, Blackout zipper provides easy entry and exit with a water tight seal UltraFlex, ultra stretch super soft neoprene for superior feel, flexibility, durability and high performance FluidFlex Firewall, measurably warmer, lighter and windproof exterior with water wicking interior thermal jersey layer Glued and Blindstitched Seams create a water tight seams for increased durability Double Super Seal Neck Krypto Knee Padz External Key Pocket with Loop Plasma Wrist and Ankle Seals Strategic Seamless Paddle Zones