Optimum Performance and Durable Construction


A Revolutionary New Fin

Truefin has developed a revolutionary fin for Scuba, Snorkeling, and Spearfishing. It has the comfort and easy kicking of a highly flexible fin, while also having the high thrust of the stiffest technical fin.

Powerful Technology

Comfort and easy kicking of a flexible fin, while simultaneously having the high thrust of a technical fin

Multi-Use Compatability

Efficient and ideal for Scuba, Snorkeling activities, and Spearfishing

Customizable Experience

Spines are removable and replaceable depending on your diving needs and goals

High Quality Material

Made in the USA with Monprene, Polypropylene, and glass filled Nylon, eliminating corrosion issues

Tested & True

Truefin is manufactured and assembled in the USA with premium materials and tested over 1,000,000 kick cycles. Each fin comes with a limited lifetime warranty (excluding heel straps) and every set of spines holds a lifetime warranty.


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Yes, Truefin has a limited lifetime warranty on each fin (excluding heel straps). In addition, the spines have a lifetime guarantee against breakage. Truefin has never broken a production injection molded glass filled nylon spine, and would like to obtain any spine that breaks for critical examination. If a user ever breaks a spine simply contact Truefin for a free replacement. Note that when a spine is stressed or pried against an immovable object such as between large rocks for example, the vertebrae draft angle may cause the effected vertebra (typically link 50000 or 60000) to laterally slide out of position. If this event occurs the spine may be reassembled and no damage occurs. Please refer to thewww.TruefinTechnical.comfor spine load testing information.

Total weight for one pair including spines and excluding heel strap - 6.2 pounds. Flat dimensions (size Large) - 23.4in long x 10.4in wide. Spines may be removed from the fin and packaged separately, while the pair of fins may be folded lengthwise. When the fins are folded, the pair of fins together occupies a volume of 6” x 10” x 18”.

Yes. Although Blue spines are great for all kicking styles, Truefin may be optimized for frog kicking without effecting flutter kicks after installing Green spines. A combination of a Blue spine used at the big toe and a Green spine used at the little toe improves canted frog kick performance (which creates a right and left fin). If a user wants the easiest kicking possible then Yellow spines are preferred, however the user will need to kick at a higher frequency for a given speed if Yellow spines are utilized.  The user may also mix and match Blue, Green, or Yellow spines.