Fins basically go on your feet, you can get loads of types and styles but they all do the same job. They provide a large surface area so your leg muscles can move you through the water. Rather than kicking like a maniac trying to swim normally, they help to reduce the amount of energy you use. All fins will have a pocket of sorts for your feet to go into and the blades for propulsion. You can get either full foot (like a shoe) or strap fins, but it’s what is best for you comfort wise. Depending on your own comfort you can also choose the blade type. Ribs, for rigidity. Vents, which increase efficiency. Channels, which also increase efficiency. Vents, which thrust water back for maximum efficiency. There are loads to choose from, but it depends on you;
