3/2mm wetsuit out of the Hyperfreak series . The HyperFreak is constructed with super light TechnoButter 3, TB3X neoprene and TB3X fully taped seams. O'Neill added 0.5mm thicker material as a step-up from its Hyperfreak Comp. The minimal seam design, lightweight, quality construction, and attention to detail make this another O'Neill team inspired favorite.TechnoButter 3 is O'Neill's exclusive new pre-stretched neoprene with featherlight. ENVY foam rubber core. The lightest, most flexible, softest material ever created. It ensures superior flexibility and fit.O'Neill uses 100 % recycled tires to produce the Carbon Black in their neoprene, as well as limestone-based neoprene and eco-friendly solvent-free lamination glue that is completely water-based.