Arena swim fins - Powerfin Pro || - GreyFast, comfortable and durable are the keywords for these Powerfin Pro 2 swim fins from Arena. They are a favourite among many swimmers and for good reason. When you think of swim fins, it's often associated with going fast, really fast. With these swim fins from Arena, you can swim faster and achieve better control in the water. The flippers are ideal for all types of swimming, whether it's lane swimming, competitive swimming, recreational swimming or