O'Neill Hyperfreak Rib Cage Vest - Black The Hyperfreak Rib Cage Vest is designed for those that enjoy high impact water sports like wake-boarding, jet ski and water skiing. So when you hit the water at speed the vest absorbs the shock preventing you from getting winded. The HyperFreak Tops feature the Exclusive TechnoButter 3 neoprene. It is 20% lighter with 30% less water absorption than any other premium neoprene. The HyperFreak Series defines warm water gear. 50+ U.P.F. Maximum Protection Seamless Paddle Zones Contortionist Seamless Shoulder Boardshort Connector TechnoButter 3 Flatloc Stitch: Breathable Seams O'Neill Hyperfreak Rib Cage Vest - Black