Regna PHOTOtoFIT: a trisuit cut from two photos

Every triathlete knows what a bad trisuit looks like after 5 km of running. It bunches at the waist. It cuts under the arms. It slides off the shoulders once the wetsuit comes down. Off-the-peg sizing, S, M, L, has not solved that in decades.

Regna, a brand from Singapore, takes a different route. Its PHOTOtoFIT app takes two photos, AI pulls 100 body measurements out of them, and machines cut the fabric to those numbers. Custom fit at a price the brand calls reasonable.

How PHOTOtoFIT works

The idea is simple and the execution is clever. Download the app on iOS or Android, take two photos of yourself in tight clothing. The algorithm identifies 100 anatomical points and builds a digital model.

From that model the machine cuts every panel of the suit, front, back, compression panels, abdominal band, to those specific proportions. There is no more of the M that is loose here and tight there. There is one pattern set, and it belongs to one body.

This is not the first attempt at custom fit in triathlon. 3D body scanning has existed in bike-fit studios for years. It is the first time the entry point is two phone photos rather than an appointment with a tailor.

What the AI cut actually changes

Off-the-peg suits are cut for the statistically average body in a given size. If you are 5 cm taller than the average M but narrower in the waist, an M will be short in the torso and slack at the middle.

Custom does the opposite: the pattern is yours. According to the manufacturer, that translates into:

• No bunching at the waist after the swim, because a peeled wetsuit does not drag the suit down with it
• Gel pockets that stay where they are put during the run
• Less chafing under the arms and in the crotch, which matters most over 70.3 and full IRONMAN

Those differences are worth seconds at best. Over long distance, though, comfort is performance: what does not hurt does not cost energy.

The price question

Regna’s marketing rests on the claim that a custom-printed kit does not have to cost a fortune. Actual prices depend on the model, ITU short-course against Pro Long-Course, and on whether you buy the top, the bottom or a full trisuit. Current figures in US dollars are listed on regna.ai.

For context, a top-shelf trisuit from Castelli, 2XU or Zone3 sets the benchmark Regna has to beat. If custom lands inside that band it is a genuine option. If it lands well above it, it stays a niche product for experienced athletes.

Does it work in the water

This is the unknown. A photograph captures static dimensions. Swimming is dynamic: the shoulders open through the catch, the legs work from hip flexion. A good swim-capable trisuit pattern is not only a set of measurements, it is panel construction that accounts for movement.

Regna has not published water-tunnel hydrodynamic testing or CdA comparisons on the bike. What you buy today is a better static fit, not a documented advantage in the water or on the road.

For an age-grouper that is enough. For a professional chasing seconds, the data is still missing.

Who it makes sense for

Buy it if:

• You have a non-standard build: very tall or very short, a short torso, long legs, asymmetric proportions
• You train for long distance, where comfort turns into performance somewhere in the fourth hour
• Previous trisuits have chafed, bunched or slipped on you

Wait if:

• A stock M from Castelli or Zone3 already fits you and you have no complaints about it
• You race sprint and olympic, where the comfort difference dissolves inside 90 minutes
• Regna turns out to cost two or three times a standard premium suit

What came before

PHOTOtoFIT is not the first attempt to democratise custom fit. MTailor, Bombsheller and in-store 3D scanning at Decathlon all tried it. Most burned out at the finish, because an AI body scan from two photos is still less accurate than a professional studio scan.

If Regna gets the price and the quality right, this is the start of a new category: custom triathlon kit without a trip to a tailor and without the cost of a studio scan.

More on this: IRONMAN 70.3 Gdynia: The Course Explained. Racelify lists triathlons worldwide with dates and organiser links.