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Finis Foil Monofin

Finis Foil Monofin
Colors may vary slightly from screen image.

Foil Monofin

Learn the proper way to do a fast and effective dolphin kick with the help of the Finis Foil Monofin. Originally made popular by free-divers, monofins are now widely used by the competitive swimming community to teach proper body alignment and equal use of up and down kicks to swimmers of all ages.

Effective Single Blade Design

The Finis product relies on single blade design to help teach and promote correct dolphin kick movement throughout the entire body. Developed by famed coach Bob Gillett, a Swimming Hall of Fame coach who was an innovator of butterfly stroke teaching methods, this monofin was made to work and ingrain proper techniques into a swimmer’s muscle memory. With both feet strapped closely together into the monofin, the wide surface area produces a successful butterfly kick like never before.

Foil Technique

The Monofin’s name comes from the “Foil” teaching technique. This means that the fin promotes an overall body motion, one that really engages both the swimmer’s leg and core muscles. While other monofins, such as Finis Wave Monofin and beginner’s Finis Mermaid Children’s Swim Fin, can help introduce the dolphin kick, the Foil Monofin actively trains the entire body to develop a strong and pronounced butterfly motion. By using the entire body to kick, swimmers begin to see faster results in their individual lap time. Because of the motion, the Foil Monofin can be used in a traditional prone position or while laying laterally in the water.


Available in bight yellow, and yellow only, the 100% all-natural marine-grade rubber Monofin has a 16"x10" surface area. It features an open toe and heel design, which allows for a secure and snug fit. The Foil Monofin’s portable and lightweight construction means that it’s an easy pack in any swim gear bag.

Size Kids Men Women EUR
XS 3.0 - 5.0 4.5 - 6.5 34 - 37
S 5.5 - 8.0 7.0 - 9.5 37.5 - 40.5
M 8.5 - 10.0 10.0 - 11.5 41 - 44
L 10.5 - 13.0 12.0 - 15.5 44.5 - 47.5
XL 13.5 - 15.0 16.0 - 17.5 48 - 49.5
To ensure an optimal performance, try pairing the Monofin with Finis’ Skin Socks for a more secure and comfortable fit.

AquaGear Opinion

While the motion and fit might take some getting used to – would most likely work best for stronger swimmers – the Foil Monofin propels quite nicely. The fit was a bit snug, so you might be best served to order a larger size if you fall into the upper section of a size category. And while it does perform nicely, the narrow foot pocket might not be the best choice for swimmers with high arches or wide feet.

The Bottom Line

If you’re in the market for a monofin that will train the entire body to learn a smooth and effective dolphin kick motion, then look no further. The Finis Foil Monofin is excellent at promoting strong legs with proportionate up and down kicks, all the while strengthening and building essential core muscles.

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