SwimFin Grey Shark - 242g EVA Foam Swimming Aid

SwimFin Grey Shark is a shark-fin-shaped swimming aid worn vertically on a child's back. Its EVA foam construction and back-mounted position leave the arms free for swimming movements, while two elasticated hook-and-loop straps adjust the fit.

Back-Mounted Swimming Support

The manufacturer describes SwimFin as a teaching aid rather than a life jacket. The fin is designed to sit on the back, and the official instructions state that it should never be worn on the front. Its vertical position is intended to support a more natural body position while learners practice movement in the water.

The product is described as suitable from 18 months and up when the child has full upper-body control and basic movement skills. SwimFin's official product description also says the design can be used by older swimmers practicing all four strokes.

Materials, Straps, And Fit

The fin is made from EVA foam, and the packaged product weighs 242g. The included regular straps measure 78cm when laid flat, while the larger replacement straps measure 85cm.

SwimFin is sold as a one-size aid with adjustable straps. The official FAQ gives an approximate supported body-weight range of 15kg to 100kg, while other listings describe a narrower 15kg to 30kg range for younger children. The broader figure is therefore best read alongside the child's size, swimming ability, and the applicable product instructions.

The package includes one SwimFin and a pair of regular-size straps with a color-coordinated logo. A user manual covers fitting and care, and the manufacturer advises adult supervision in and around water.

US Price And Position

In the United States, Swim Lessons University lists the Grey Shark model at $37.99 as of 09/23/2026. The US listing identifies the color as Grey Shark and gives the SKU as SwimFin-grey.

The product occupies a different niche from arm bands, chest rings, and rigid kickboards. Its defining trade-off is the back-mounted buoyancy aid: the arms remain unobstructed, but the device does not replace instruction, water competency, or active supervision.

Who It Fits Best

SwimFin Grey Shark fits children who are beginning to coordinate arm and leg movement and need buoyancy without an aid around the arms. The adjustable straps also allow use beyond the youngest age bracket, although the fit must be checked before every session.

Its main limitation is safety classification. SwimFin's own FAQ says it is not a personal flotation device or life jacket, and the fin must be worn only on the back. For supervised lessons and shallow-water practice, the format offers a clear training purpose; for rescue protection or unsupervised water use, it is the wrong category.