Wetsuit Hyperfreak from O'Neill. O'Neill's Hyperfreak range features special TechnoButter 3 & TB3X neoprene, which is now lighter and softer than ever before - 20 % lighter with 30 % less water absorption. An ergonomic, seamless sleeve bottom allows unrestricted movement and prevents rash. Abrasion-resistant, highly elastic neoprene Krypto knee pads with ergonomic design provide comfortable durability.