XS Scuba Phenom FinWhat do you get when you blend the best design features of the industrys leading fins? Phenomenal performance! Introducing Phenom, XS Scubas high performance fin for scuba diving. Phenom fins start with an iconic blade design that creates super channels on both the upstroke and downstroke. The channels direct the water longitudinally down the length of the blade, preventing spillover the side ribs The blade is attached to a soft, comfortable foot