O'Neill Men's Hyperfreak 4/3+ Chest Zip Fullsuit Wetsuit Features: The HyperFreak F.U.Z.E. (Chest Zip) is constructed with super light TechnoButter 3 and TB3X neoprene. We added 0.5mm thicker material as a step-up from the HyperFreak Comp. The minimal seam design, lightweight, quality construction, and attention to detail make this another team inspired favorite. F.U.Z.E. Closure Minimal Seam Design 360 Degree Barrier with Drain Holes TB3X Fully Taped Seams Glued and Blind Stitched Seams Full Body/ Legs: TechnoButter 3 Arms/ Shoulders: TechnoButter 3X Plus (+) - 0.5mm Extra thickness for even more warmth Aqua Alpha Solvent Free Neoprene lamination