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O'Neill 5.5/4 Psycho Tech Chest Zip Hooded Wetsuit

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O'Neill 5.5/4 Psycho Tech Chest Zip Hooded Wetsuit

sku# 229604
O'Neill - 5.5/4 Psycho Tech Chest Zip Hooded Wetsuit
Model Info


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Product Info

With an uncompromising focus on warmth and durability that's derived from sustainable, high-performance recycled materials, the new O'Neill 5.5/4 Psycho Tech Chest Zip Hooded Wetsuit is better than ever before. With water tight double-sealed stitchless seams holding together O'Neill's revamped TechnoButter 4 paneling, this F.U.Z.E. entry wetty will empower you to stay warmer for longer than ever before.

Product Details


Recycled Oyster Shells and Eco Carbon Black Infused Neoprene

Recycled Dope-Dyed Yarn Jersey

TechnoButter 4 Duraskin Air Firewall (Chest & Back)The next great thermal breakthrough made better with trapped pockets of air. TB4 Air Firewall uses a special lamination process paired with a core of aerated neoprene and a graphene fiber jersey to create the toastiest conditions. Take summer with you.

TechnoButter 4 Firewall (Thighs, Butt, Shins & Calves)The all new TechnoButter 4 Firewall utilizes the recycled graphene fibers at a thicker pile to create a fire hot feedback loop. As the body heat warms the graphene fibers they conduct the heat back into the body.

TechnoButter 4 (Arms & Shoulders)TB4 builds on the legendary TechnoButter 3, the next evolution of the jersey introduces recycled yarns infused with graphene for increased wear strength and heat retention.

TechnoButter 4X (Entry)TechnoButter 4X goes beyond the gooey stretch, and soft feel of TB3X. Recycled graphene fibers line the jersey allowing for incredible stretch with added strength and warmth retention, all with a new look.


F.U.Z.E. Chest ZipFront Upper Zip Entry uses a free floating zipper panel and anti-flush barrier with drain holes to keep you dry and feeling loose.


360° Barrier with Drain Holes

Super Seal Cuffs with Plasma Wrist and Ankle Seals

Aqua Alpha Solvent Free Neoprene Lamination

External Key Pocket with Loop

PLUS (+) = 0.5mm Extra Thickness For Even More Warmth

Stitchless Exterior Flued Seam Weld and Interior TB3X TapeExterior Flued Seam Weld and Interior TB3X Tape on either side of a stitch-less seam takes wetsuit construction to the next level. The all-new combination of reliable durability and low-profile comfort simply can't be beat.


  • Wetsuit Thickness: 5.5/4 mm
  • Wetsuit Fit: Chest Zip
  • Material: Neoprene
  • Seam Sealing: Fully Taped, Welded Seams
  • Manufacturer Item Number: 5506-A00
  • Warranty: 1 Year

Other Notes

O'Neill products can only be shipped within the United States and Canada



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