You can't beat the Freak.
A good wetsuit is like the perfect pair of undies?if everything's working perfectly, you won't even know it's there. That's the idea behind O'Neill's Pyscho Freak Z.E.N. Zip 4/3 Men's Wetsuit, which combines O'Neill's three most highly engineered neoprenes and tons of tech features to keep you so warm and comfortable that you'll forgot you're not getting barreled in the buff.
The Pyscho Freak Z.E.N. is a top-of-the-line franken-suit that cribs the best features from the previous Psycho Freak and Psycho 3 to provide warmth in chilly water without restricting movement or rubbing your skin the wrong way. O'Neill constructed the torso from TechnoButter 3 Air Firewall neoprene, which gives youunparalleled stretch and heat retention, and built the legs from ultra-stretchy and lightweight TechnoButter 3 Firewall, and engineered the arms from TechnoButter 3 to give you killer stretch and mobility. The seams are carefully placed to help you enjoy unencumbered paddling, and each one is finished with stitchless and watertight Double SuperSeam welding that's been urethane sealed and triple glued for maximum waterproofing.
Around the wrists and ankles, the SuperSeal watertight cuffs give you a ridiculously snug low-and profile seal, while additional Plasma seals form a watertight barrier to prevent flushing. Up top, the Double SuperSeal neck stops water from coming in the top of your suit without choking you. The Pyscho Freak's final major innovation is the Z.E.N. floating zip. It's designed to be fully watertight, but it's also lined with a drain-hole-equipped panel that O'Neill calls Barrier 2, so any water that does penetrate the zip will be blocked by the Barrier 2 and forced out the drain hole instead of dripping down your back and turning things cold in a hurry.

A freak of a wetsuit designed for psycho surfers
4/3 thickness for water temperatures between 52 and 62F
Technobutter 3 neoprene with lightweight Envy foam rubber for warmth
Technobutter Air Firewall Smoothskin paneling for extra comfort
Stitchless Super Seam Weld is non-chafing, waterproof, and flexible
Z.E.N. Zip Entry with free-floating zipper keeps you unrestricted
Item #ONE018Q

Material[torso] TechnoButter 3l neoprene, [legs] TechnoButter 2 Firewall neoprene, [arms, shoulders] TechnoButter 3 neoprene
Water Temp52 - 62F
Thickness4 / 3mm
ZipZ.E.N. (back zip)
GasketsSuperSeal cuffs, SuperSeal neck, Plasma wrist and ankle seals
Seam Constructiondouble SuperSeam weld
Recommended Usesurfing
Manufacturer Warranty1 year