CMAS (Confédération Mondiale des Activités Subaquatiques – World Underwater Federation) is the global governing body for underwater sports, including finswimming, freediving, underwater rugby, underwater hockey, and spearfishing. Founded in 1959, CMAS is responsible for setting international competition rules, safety standards, and equipment regulations to ensure fair play and athlete well-being. The federation also promotes underwater activities worldwide through sports events, environmental initiatives, and training programs.

Finswimming is one of CMAS’s most popular sports, requiring speed, endurance, and technique using specialized fins and streamlined swimming movements. To maintain consistency and fairness in competitions, CMAS updates its official rules and equipment regulations regularly.

For 2025, the latest CMAS Finswimming Regulations cover:

• Competition Rules – Guidelines for World Series, World Cup, open water, and elimination races.
• Approved Equipment – Official lists of homologated monofins, bi-fins, and swimsuits allowed in competitions.
• Athlete & Organizer Policies – Anti-doping regulations, selection criteria for major events, and organizational protocols.
• Judging & Media Guidelines – CMAS standards for race judging, social media coverage, and broadcasting.

Adhering to CMAS rules ensures that athletes compete on an equal playing field with standardized equipment and fair competition guidelines. Whether you’re an athlete, coach, or event organizer, staying updated with CMAS regulations is crucial for participating in official international competitions.

For the most up-to-date information, refer to the official CMAS documents and approved equipment lists.