Scuba diving

Fin­nish navy diver using tech­nical scu­ba for chal­len­ging underwa­ter assignments

Free diving

Mul­tiple natio­nal records and natio­nal cham­pions­hips across various discipli­nes both in pool and in open water

2 years in AIDA world ran­king top-10 in dis­tance diving with fins — discipline

AIDA **** free diving instructor

Fin­nish Diver Fede­ra­tion’s “Diver of the Year” in 2008


info (at)

Company register IDs

Y‑2764351–6 ; VAT FI27643516


Lohi­tie 3B, 02170 Espoo, Finland

Inspiration behind FinnFin Diving


The ins­pi­ra­tion to Finn­Fin Diving star­ted from deca­des of diving expe­rience across mul­tiple diving discipli­nes. In all the­se discipli­nes the avai­lable diving fins had recur­ring problems and shortco­mings:


  • The diving fins are not ergo­no­mic: they are eit­her efficient OR com­for­table. The most efficient com­pe­ti­tion-level fins are so pain­ful, that the ath­le­tes don’t put them on until the last minu­te befo­re their dive start. The com­for­table fins on the other hand are so inef­ficient, that one is almost bet­ter off diving wit­hout any fins.
  • Diving fins’ efficiency has been unop­ti­mized, lea­ving mul­tiple weak­nes­ses: power gene­ra­tion has pri­ma­ri­ly been done in the front/­down-kick using only front side muscles (abs, quads…), power trans­fer from muscles into pro­pul­sion has had mul­tiple weak links and hydro­dy­na­mics has been far from optimized.
  • The adjus­ta­bi­li­ty of diving fins has been very limi­ted. Diving fins are often per­ma­nent­ly attac­hed stand-alo­ne pac­ka­ges e.g. foot poc­ket glued to the fin bla­de. This means that when buying mul­tiple fins for dif­fe­rent applica­tions, or upgra­ding exis­ting equip­ment, the diver also needs to re-purc­ha­se tho­se parts that (s)he was alrea­dy com­for­table with (e.g. foot poc­ket). Addi­tio­nal­ly, the­re are no stan­dards avai­lable that could be used to com­pa­re diving fins e.g. for their size, stiff­ness or ben­ding cha­rac­te­ris­tics. This forces divers to buy a ‘pig in a bag’ when purc­ha­sing diving fins, and only fin­ding out after the purc­ha­se if the fin bla­de was good or not, and if the foot poc­ket fits the leg or not.

Divers have grown to accept the­se and many other shortco­mings as una­voi­dable neces­sa­ry evils, and the­re has been very limi­ted inno­va­tions in the industry attemp­ting to resol­ve these.


Later, after gai­ning expe­rience from cycling, it beca­me clear that the­se shortco­mings were not ine­vi­table:


  • Cycling shoes and riding posi­tions can be efficient AND com­for­table at the same time
  • Clip­ped cycling shoes and pedals allow gene­ra­ting lot’s of force also from the back-side muscles (ham­string, glutes…)
  • Cyclists are obses­sed with see­king com­pe­ti­ti­ve advan­ta­ge from bet­ter power trans­fer efficiency, aero­dy­na­mics and weight
  • Vast majo­ri­ty of com­po­nents are stan­dar­dized and interc­han­geable, even tho­se used in top com­pe­ti­tions whe­re no power trans­fer loss caused by weak inter­faces could be tolerated

Using this cycling ana­lo­gy: if bicycles were made like typical diving fins,


  • you would not know what gear your bike would have when you order it
  • eve­ry new bike would come with their own, per­ma­nent­ly attac­hed cycling shoes
  • cycling shoes would not be sha­ped to hold a human foot comfortably
  • chan­ging the gea­ring, shoes or sus­pen­sion set-up on your bike would requi­re buying a comple­te new bike(+shoes)
  • the parts in the dri­ve chain would be only loo­se­ly attac­hed, causing a mas­si­ve power trans­fer loss
  • the pedal would allow gene­ra­ting force from 10‑o’clock to 2‑o’clock positions.
  • the riding posi­tion would be fixed up-right, causing unneces­sa­ry aero­dy­na­mic drag


With the­se ins­pi­ra­tions in mind, Finn­Fin Diving was foun­ded to make ergo­no­mic, efficient and adjus­table diving fins.