A men's blueseventy wetsuit and a women's blueseventy wetsuit start from the same materials and design goals. The difference is in the pattern. Women's suits use a distinct pattern through the bust, torso, hips, wrists, and ankles. Men's suits are patterned around shoulder width, torso length, and leg taper.
A swim wetsuit works only when it fits close enough to control water exchange without restricting the shoulders. Men's and women's bodies tend to differ through the shoulder girdle, chest, waist, hip, and leg. A panel that fits a broad shoulder and narrower hip well on one body can gap at the lower back or bind across the chest on another, even when the height and weight measurements match. blueseventy separates the two lines so each fit problem gets its own pattern.
Femme Fit: the women's-specific cut
Every women's blueseventy wetsuit uses Femme Fit. The changes are specific:
- Bust and torso: the panels are shaped to lie flat, so the suit does not compress the chest or gap at the lower back.
- Neckline: the neck sits slightly lower to reduce chafing on long swims.
- Wrists and ankles: the taper is adjusted so the seals close without digging.
- Zipper: the zip is extended for easier entry, more room through the hips, and faster transitions.
The range also grew around these fit problems. In 2014, Femme Fit expanded to 15 women's sizing options. A closer size match reduces the leaks and shoulder pull that come from forcing a too-big or too-small suit.
Men's cut priorities
On the men's side, the pattern centers on shoulder mobility and a close torso seal. You want the suit snug through the chest and under the arms. The neck seal should sit flat. The wrists and ankles should close cleanly. Any bagging in the lower back or folds across the stomach means the suit is not doing its job.
The same model families appear in both men's and women's ranges. Helix, Reaction, Fusion, Sprint, Thermal Reaction, and the sleeveless options follow the same design logic, but the panels are recut for each fit. A women's Fusion and a men's Fusion share the model's purpose, but not its pattern.
How to check the fit
Start with the size chart, then test the suit on dry land. It should feel snug, not painful. Neoprene relaxes when wet, so the water is the better test environment.
Check the torso first. There should be no bagging at the lower back and no deep folds across the front. Then lift your arms overhead. If the suit pulls hard through the shoulders or presses the neck, adjust the donning before you change sizes. An improperly donned suit, especially one pulled too low in the shoulders, causes fatigue before the swim starts.
Check the wrist and ankle seals. They should lie flat and close without digging. A small amount of water entering the suit is normal. A suit taking on water continuously around the seals is not.
The same materials in both cuts
blueseventy uses Yamamoto neoprene in 38, 39, and 40 cell across the suit line. Higher cell neoprene is more flexible. The men's and women's models do not differ in that material choice. They differ in where the panels sit and how the seams pull. That difference is why a swim-specific suit needs to be tried on, not just ordered by a generic size label.
Take a Test Swim
The final check is the swim itself. blueseventy allows you to swim in a wetsuit and still return or exchange it if it is clean, dry, unmodified, and has the tags. That policy exists because fit is the deciding factor. A suit that fits well on land but leaks or fatigues you in the water is not the right suit.
Buoyancy equals speed in the water. The right pattern keeps the suit sealed, your shoulders free, and your hips high, without you fighting the neoprene for 1500 meters.
