The Kids Hyperfreak 5/4+ with 5.5 and 4.5mm thick Technobutter 3 neoprene is a high end kids wetsuit pulling all the stops. It is incredibly stretchy and warm and at the same time is lighter and absorbs less water than most other wetsuits. This is a wetsuit for those that are seriously into watersports (or those that just want to be extra comfortable).  Technobutter 3 & TB3X neoprene O'Neill's exclusive new improved stretch, hydrophobic neoprene with featherlight ENVY foam rubber core. Ultimate, flexibility, warmth and comfort. Combined with Technobutter 3X, the lightest, most flexible, softest material ever created. Glued, Blindstitched & taped Seams Soft and durable neoprene seam tape. 0.5mm split-neoprene applied to triple-glued seams to seal out water keeping you dry and loose. F.U.Z.E. Entry system O’Neill’s exclusive F.U.Z.E. (Front Upper Zip Entry) system offers a fresh alternative. Using the same free floating zipper technology as our patented Z.E.N. ZIP closure. The F.U.Z.E. closure keeps you dry and allows unrestricted flexibility. Double superseal neck A toasty warm two layer design featuring a 360˚ smooth skin interior lining, wide adjustablility, and a secure lock down. Fully adjustable and watertight.