Editing Swimfin (section)

===Fins vs monofins===
The vast majority of fins come as a pair, one fin is worn on each foot. This arrangement is also called bifins, to distinguish it from monofins. A [[monofin]] is typically used in [[finswimming]] and [[free-diving]] and it consists of a single fin blade attached to twin foot pockets for both the diver's feet. Monofins and long bifin blades can be made of [[glass fibre]] or [[carbon fibre]] composites. The diver's [[muscle]] power and swimming style, and the type of activity the fins are used for, determine the choice of size, stiffness, and materials.{{citation needed|date=December 2016}}