Swimfin

A swimfin, also known as a fin, flipper, or diving fin, is a foot-worn accessory made of rubber, plastic, or composite materials. Swimfins are used in activities such as swimming, diving, snorkeling, bodyboarding, and bodysurfing to propel the wearer through the water more efficiently. By increasing the surface area of the foot, they augment the amount of thrust generated with each kick, allowing the swimmer to travel faster and farther with less effort.

Swimfins come in various designs, categorized primarily by blade shape and foot pocket style. Blade shape commonly includes full-foot fins, which enclose the entire foot, and open-heel fins, which feature an adjustable strap to secure the fin. Blade shapes vary, with some being longer and more rigid for powerful propulsion (often favored by divers), while others are shorter and more flexible for greater maneuverability (commonly used by snorkelers and bodyboarders).

The selection of appropriate swimfins depends on the intended use. Divers generally opt for sturdier, larger fins for enhanced power and control, especially in currents or when carrying equipment. Snorkelers and recreational swimmers might prefer smaller, lighter fins for ease of use and comfort. Specialized fins are also available, such as split fins, which are designed to reduce drag and increase efficiency, and monofins, used in competitive freediving and finswimming. Proper fit and fin design are crucial for optimizing performance and preventing fatigue or injury.