O’Neill Pyscho One 4/3mm Chest Zip

O’Neill Pyscho One 4/3mm Chest Zip

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The Unparalleled Premium in Lightweight Flexibility and Durability. Now featuring TB Firewall with heat retaining thermal interior layer in the chest, back, and legs. Team inspired minimal seam design.


  • Z.E.N. Zip Closure (Back Zip)
  • F.U.Z.E. Closure (Chest Zip)
  • Minimal Seam Design
  • Anti-Flush Barrier (Z.E.N. Zip)
  • 360° Barrier With Drainholes (F.U.Z.E.)
  • Double Seal Collar


  • Fluid Seam Weld
  • Arms/ Shoulders/Calf: TechnoButter 3
  • Chest / Back/Shins/Butt : TechnoButter 3 Firewall
  • Aqua Alpha Solvent Free Neoprene Lamination
  • Eco Carbon Black in Neoprene
  • Limestone Neoprene
  • Dope-Dyed Yarn Jersey