The Kit
v2, the Langkawi edition
A one-piece trisuit for long-course racing in Southeast Asian heat, in the same charcoal, teal and ember as this site. Every panel, pocket and colour on it answers a race-day problem.
Last updated October 14, 2026. Next update: when the suit arrives.
Concept renderThe brief
Four problems from a tropical long-course day shaped every decision on this suit. The logo came last.
Concept render01
The problem
Langkawi race days regularly run above 32°C with high humidity, and the brand's base colour is near-black.
The answer
Dark fabric absorbs far more sunlight than light fabric, so the lighter teal goes on every surface that faces the sun and charcoal stays where the sun load is low.
Sources: Malaysia Cyclist race guide, Langkawi, Watanabe et al. 2008, solar absorptance of clothing fabric
02
The problem
A rear pocket is a blind grab at speed, and earlier suits taught us that the hard way.
The answer
Race fuel moves to the bike and the run belt. The suit carries gels in side pockets you can see, and keeps its rear pockets for backup.
03
The problem
A one-piece is a hassle in a portable toilet.
The answer
A full-length zip opens the suit at the front instead of peeling it off. On course, IRONMAN allows a front zip open to any length if it stays connected at the bottom and the shoulders stay covered, so the same zip doubles as a vent. It must be fully zipped at the finish.
Sources: 2026 IRONMAN rule text, 5.01(i), IRONMAN 70.3 Langkawi athlete guide
04
The problem
Langkawi water is expected at about 29°C, and age-group wetsuits are allowed only up to 24.5°C.
The answer
The suit is the swimwear. IRONMAN requires textile swimwear that does not extend past the elbow or the knee, so the sleeves and legs stop short of both.
Sources: IRONMAN 70.3 Langkawi athlete guide, IRONMAN Competition Rules, section 4.03
Explore the suit
Select a numbered point to see what each part of the suit does and why it is there.
FrontBackConcept render01
FrontThe yoke, both sleeves, the upper back and the outer thighs take the most direct sun on the bike and the run. They carry electric teal, the lightest panel colour in the palette.
Concept render of the v2 design. Photos of the finished suit follow on delivery.
Up close
Concept renderZip and yoke line
Full-length auto-lock zip with an ember pull, and ember piping where teal meets charcoal.
Concept renderSide panel and sleeve
Open cooling mesh down the ribs. The sleeve stops above the elbow.
Concept renderThigh pocket and hem
A gel in plain sight, and a gros grain hem above the knee.
The colour system
IronPreneur is dark by design, and dark fabric runs hot in direct sun. Measured outdoors, black fabric absorbed 61% of solar radiation against 17% for white. In a TU Delft test, the skin side of black fabric ran 5 to 10°C hotter in sunlight than white or reflective fabric. Under an artificial sun, heart rate during an hour on a cycle ergometer averaged 154 beats per minute in black polyester against 142 in white.
Sources: Watanabe et al. 2008, solar absorptance of clothing fabric, Teunissen et al. 2021, TU Delft, fabrics in sunlight, Nielsen 1990, solar heat load during exercise
The first concept answered with Coldblack, a finish its maker says reflects up to 80% of heat rays. The supplier for v2 does not offer it, so v2 answers with placement. Teal is not white, but it is far lighter than charcoal and it stays on brand; a Triathlete reviewer chose a white upper on his Regna suit for the same reason.
Sources: Schoeller, coldblack, Triathlete review of Regna, August 2026
Sleeves and side panels are rated UPF 50+, the top rating, which blocks about 98% of UV.
Concept renderCharcoal base
#171614 · PMS 419C
Lower torso, shorts, rear pockets
Electric teal
#3FD2C7 · PMS 3252C
Yoke, sleeves, upper back, outer thighs
Ember orange
#F26B1D · PMS 1505C
Piping and zip pull only
Off-white
#E8E8E6 · Cool Gray 1C
Chest wordmark and icon
Side panel grey
#1C1B19 · PMS 446C
Cooling side panels and side pockets
The suit and this site share one set of colour tokens. For print, the supplier converted each sRGB value to the nearest Pantone reference.
Materials
Every line carries its evidence level, and supplier performance claims we cannot check are left off the page.
Torso
Art Mate (MATE-TPS)
UPF 50+ sun protection for the core.
Sleeves and side panels
ART EOLO-COOL FLUID
Ultra-light, open knit for airflow. Rated UPF 50+.
Regna lists the same fabric on its Elite bike jersey as 74% polyester and 26% elastane, 34% of it recycled.
Sources: Regna, Men's Elite Trisuit Open Zip, Regna, Elite Bike Jersey
Underarm
Nano Bamboo
A soft panel in the highest-friction zone.
81% nano bamboo charcoal polyester, 6% nylon, 13% spandex on Regna's Pro Athlete suit. Regna's odour claim is not repeated here.
Sources: Regna, Men's Elite Trisuit Open Zip, Regna, Pro Athlete Trisuit Open Zip RBE
Legs
Marettimo, Italian
Supportive stretch through the legs.
76% polyester, 24% elastane on Regna's Pro Athlete suit. Regna's claim that it reduces muscle fatigue is not repeated here.
Sources: Regna, Men's Elite Trisuit Open Zip, Regna, Pro Athlete Trisuit Open Zip RBE
Pad
Regna Distance Pad, Long Distance option
Pressure relief for long hours in the saddle.
Front zip
YKK auto-lock, full length
Venting on course and a front opening at toilet stops.
Leg hems
Gros grain bands, above the knee, reflective tabs
Holds the hem in place without constriction.
One reviewer prefers laser-cut hems to separate grippers.
Sources: Regna, Men's Elite Trisuit Open Zip, Slowtwitch review of Regna, April 2026
Pockets
Two side pockets, an inner upper-back cool pocket, rear pockets
Gels in sight, ice on the upper back, backup storage.
Fit
PHOTOtoFIT scan, close race fit
Cut from two phone photos and more than 100 body measurements.
Custom pieces cannot be returned for fit.
Sources: Regna, About, Regna returns policy
Not on this suit: a Coldblack finish and Omius cooling pieces. The reasons are in the next section.
The thinking
Kit decisions are trade-offs. These are the ones behind v2, with the cost of each written down.
Concept render01
Regna offers full custom design only on its one-piece suits; its tri tops and shorts come in preset designs. A one-piece also cannot ride up at the lower back in the aero position. The cost: a sit-down toilet stop still means arms out of the sleeves. The format for Da Nang is decided after Langkawi.
Source: Regna triathlon catalogue
02
A bento box and stem flask on the bike, a race belt on the run, gels in the side pockets, rear pockets for backup. The cost: more to set up in transition, in exchange for never reaching blind.
03
Regna does not offer Coldblack. AP3X, a custom maker that builds to the Coldblack standard, lists 3 days for design plus 25 to 30 working days for production and delivery: too slow for November. A TU Delft test also found that coldblack-treated fabric let through substantially more solar heat than dedicated reflective fabrics. Colour placement does the job for v2, and Coldblack stays on the shortlist for Da Nang.
Sources: AP3X custom trisuit, Teunissen et al. 2021, TU Delft, fabrics in sunlight
04
Omius cooling pieces are graphite that gives water five times more surface area to evaporate from. In a peer-reviewed test of the Omius headband in 35°C heat, forehead temperature dropped, but rectal temperature, heart rate and 5 km time-trial performance did not improve. Regna's product pages also do not say where the pieces sit on its suits. Not a bet worth taking on race day.
Sources: Omius FAQ, Desroches et al. 2024, Journal of Thermal Biology
05
The suit is cut from a two-photo PHOTOtoFIT scan that captures more than 100 measurements. The cost is risk: custom pieces cannot be returned for fit. Fit also changes through a build, so Da Nang gets a fresh scan in March 2027.
Sources: Regna, About, Regna returns policy
Versions
v1
ConceptJune 2026
The first Dark Force direction, for Da Nang heat: a charcoal base paired with a Coldblack finish, teal on the sun-facing zones, and a two-piece for toilet access.
v2
OrderedOctober 2026
One-piece, full-length zip, teal on every sun-facing surface. Ordered in October, due in Singapore by November 6, race debut on November 21.
v3
Planned2027
A fresh scan in March 2027 for Da Nang IM 140.6 in May. Format and finish decided after Langkawi, with Coldblack and a custom two-piece back on the table.
Off the course
The cap repeats the suit's V-split: a teal crown, ember V piping, an ember top button and a charcoal front with the icon and wordmark, on a mesh back.
It is kit for the days around a race, from travel and briefings to the walk back from the finish, and not for the race itself. So it is not held to race-cap criteria such as a soft, sweat-absorbing inner band.
Concept render
Concept renderConcept renders. Photos follow on delivery.
Made by
The suit is made to measure by Regna, headquartered in Singapore with its factory in Vietnam, near Ho Chi Minh City. Its PHOTOtoFIT app cuts the pattern from two phone photos and more than 100 body measurements.
Source: Regna, About
Independent reviews in 2026 were positive and specific. Triathlete reported no chafing after more than 30 km of swimming, 800 km of riding, 160 km of running and a 70.3. Slowtwitch praised the fit, and flagged a fiddly ice pocket, separate hem grippers and a slightly long torso.
Sources: Triathlete review of Regna, August 2026, Slowtwitch review of Regna, April 2026
Every outside fact on this page links to one of these. Supplier details not listed here come from our correspondence with the supplier.
The club kit
v2 is a test order before any club commitment. If it holds up in Langkawi, the next step is a club kit for everyone who races for the IronPreneur TriClub. Join the waitlist to be first in line.
Signing up here flags your interest in the club kit.