O&#39;Neill Wetsuits Men&#39;s Epic 4/3mm Full Suit 4/3mm FluidFlex (tm) Firewall chest and back; Double Seal Neck Closure LSD: Lumbar Seamless Design; Krypto Knee Padz Ergonomic, seamless undersleeve panel allows for unrestricted motion and helps eliminates rashing Glued-in Covert Zipper Construction Strategic Seamless Paddle Zone