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Triathlon

men's fjord 4.0

the Fjord 4.0 represents the next evolution in wetsuit innovation and performance development by deboer. building on the success of its predecessor, the Fjord 4.0 incorporates cutting-edge advancements...

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CHF 669.00
CHF 1,254.00 CHF 669.00
Clearance Sold out
Fit
Men’s Women’s
Select size · 12 cuts incl. tall Fit quiz →
Size
Plain English — your first wetsuit

why it feels tight: on dry land a right-size wetsuit feels firmly snug — like a handshake everywhere. In the water it eases and disappears. It’s only too small if you can’t breathe deeply or raise your arms overhead.

what buoyancy means: built-in float. This suit lifts your hips and legs so you stop dragging them — for most first-timers that’s worth more than months of training.

putting it on: dry skin, go slow, and use fingertip pads — never nails. Nail nicks are the #1 wetsuit injury.

Email the fit team →
free shipping over $180
30-day returns and exchanges
  • single-seam front panel — less drag, nothing to fail
  • buoyancy mapped to the hips for a flat, fast line
  • thin, mobile shoulders that never fight your catch

Description

the Fjord 4.0 represents the next evolution in wetsuit innovation and performance development by deboer. building on the success of its predecessor, the Fjord 4.0 incorporates cutting-edge advancements to deliver unparalleled comfort, efficiency, and speed in the water. attention to detail was a paramount principle when developing the new suit.

featuring a revolutionary new entry and exit system with improved paneling, the Fjord 4.0 allows for more efficient donning and doffing. the new single seam shoulder panel feels like a second skin, providing unrestricted movement and enhanced flexibility. a new carbon-inspired patterned panel in the shoulder area further improves hydrodynamics, reducing drag and increasing speed through the water. the most flexible shoulder panel in the world is now even faster, better fitting, and more efficient in the water.

the Fjord 4.0's improved chest fit prioritizes oxygen uptake and open breathing, allowing athletes to perform at their peak for longer durations. this innovative design optimizes body position and buoyancy, resulting in reduced fatigue and improved overall performance. when combined with the new neck panel, the 4.0 will allow swimmers and triathletes to have a more durable and comfortable fit when pushing the limits of their swim performance.

developed through extensive research and testing with world-class athletes, coaches, and scientists, the Fjord 4.0 represents the pinnacle of wetsuit technology. its advanced features and materials work in harmony to provide a competitive edge for triathletes and open water swimmers alike.

specifications:


- advanced x-skin neoprene with enhanced buoyancy and flexibility
- single seam shoulder panel for unrestricted movement
- carbon-inspired patterned shoulder panel for improved hydrodynamics
- optimized fit for enhanced oxygen uptake and breathing
- redesigned entry and exit system for effortless donning and doffing
- c8 coated, hydrophobic super-stretch comfort lining
- ykk stainless steel bottom-up runner zipper
- hand glued with double blind stitched seams
- suitable for cool temperatures down to 16° c / 61° f
- approved for use in ironman, world triathlon, and etu events
              Why it's fast

              built around one idea: get out of the way.

              7%
              Less passive drag vs a stitched suit
              3cm
              Higher hip line in the water
              4mm
              Core & hip buoyancy
              38hrs
              Flume testing per build
              The detail

              specifications.

              Construction single-seam front panel
              Buoyancy high · 4mm core & hips
              Shoulder panel 1.5mm for free rotation
              Neoprene HBS neoprene 41 SCS
              Best for triathlon · open-water racing
              Water temp 14–24°C / 57–75°F
              Cut men's & women's

              get the fit right.

              a wetsuit should feel snug on land and it eases the moment you're in the water. any looseness becomes a fold, and every fold scoops water and adds drag.

              not sure on size? our fit team will confirm it from two photos before your first swim.

              Find your size →Size chart
              606A6722_1
              Worn in open water

              The moment you push off, the suit disappears. That's the whole point.

              Kristian Blummenfelt · DeBoer Athlete

              “The fastest wetsuit we've tested.”Alex deboer · co-founder
              Worn on T100 podiums2024–2026
              Complete the kit

              you'll want these with a wetsuit