,Based on the very first hydro fin design with adaptions to suit today's demands.The Original fin continues to provide a high-performance fin at an affordable price., Hydro Originals are symmetrically shaped ensuring a balance and correct kick. Made from 100% natural floating rubber. Unbeatable value for money. Since 1986, Hydro's Original Surfing Finz the first surfing fins made specifically for tube riding. Still Ripping.