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° 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 | O'Neill Men's Hyperfreak 4/3mm+ Chest Zip Full Wetsuit in Black, Size Small