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Blueseventy PZ4TX Tri Swimskin - Men's

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Item # BLS000O

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Item # BLS000O

Second skin.

The governing body's tendency to keep a tight lid on what is and is not race-legal in a triathlon can make successfully navigating an event a taxing endeavor before you even hit the swim. Racing bans certainly sent Blueseventy to the drawing board, but after countless prototypes and some Peterman-esque dabbling in various exotic materials, the New Zealand-based manufacturer finally produced the second generation in its USAT and WCT race-legal swimskin line, the PZ4TX Tri Swimskin.

Blueseventy has always put a premium on science over snake oil and proven results over fanciful marketing claims, and the PZ4TX reflects that. The Swimskin comprises four different materials, each serving a location-specific function with an eye toward helping to propel you into T1. It leads into the water with a material that, though its low weight is a welcome subtraction, justifies having the pole position by dint of its hydrophobic properties. Since it shrugs off water, it both reduces drag and doesn't immediately add weight at the start of the swim, which translates to a more efficient swim that doesn't pull your torso and shoulders down. The latter benefit is especially helpful for beginning swimmers, but even the veteran water dogs among us will appreciate the help in maintaining form.

The swimskin's back is divided in half, with the upper portion putting emphasis on gentle compression and heat reflection. This reduces fatigue and keeps the fit tight while also keeping the temperatures down. If the temperatures are high enough that you aren't using a wetsuit, then overheating can be a serious issue in longer events. The lower panel also does its part in this regard. It's made from a high-stretch material that accommodates the less stretchy, more compressive areas of the suit while also facilitating temperature regulation during warm swims.

Besides tying the suit together, the side panels serve two functions primarily. First, they're textured to improve hydrodynamics by guiding water around your body without allowing it to separate into unruly, drag-producing turbulence. Second, they provide a slightly more stretchy compression than the front and back panels, which keeps the fit snug and flap-free by conforming to your body contours. The PZ4TX is finished with ultrasonically welded seams and a YKK locking zipper, virtually eliminating transitional ridges and extra bulk from a lanyard.

Tech Specs

Recommended Use:
swimming, triathlon
Manufacturer Warranty:
2 years

Size chart



Weight121-143 lbs141-165 lbs150-172 lbs158-187 lbs160-190 lbs176-198 lbs192-220 lbs209+ lbs
BuildExtra SmallSmallSmall/TallMediumMedium/TallMedium/LargeLargeExtra Large
How to Measure:
For best results, take measurements over your underwear.

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Best swim skin

  • Familiarity: I've put it through the wringer
  • Fit: True to size
  • Size Bought: Medium

Definitely the best swim skin on the market.

Awesome Swim Skin!

  • Familiarity: I've used it several times
  • Fit: True to size
  • Size Bought: Medium

Wore this suit in Kona this year. Definitely a fast suit and very comfortable -- almost forgot to take it off after swim!


  • Familiarity: I've put it through the wringer
  • Fit: True to size
  • Size Bought: Med

Definitely a must have in a non wetsuit swim. Very comfortable and super easy to get out of with the flip zipper in back. Did I mention it was FAST!!!!

makes you faster

  • Familiarity: I've used it several times
  • Fit: True to size
  • Size Bought: Large

This swimskin is fast and comfortable. My swim times have been comparable to wearing a full sleeved wetsuit. This is a great option when wetsuits are not legal.

Additionally the back zipper is super easy to use and to take off the swim skin you just flip the zip and rip the shoulders off. Love it.

Free speed

  • Familiarity: I've used it several times
  • Fit: True to size

This was my first time in a swimskin and I now don't know why I waited so long! For non-wetsuit swims I would just wear my kit and water would constantly get into it and significantly slow me down. The PZ4TX was easy to put on but more importantly easy to take off too. I'd recommend it to anyone, novice or pro.

Free speed

  • Familiarity: I've used it several times
  • Fit: True to size
  • Size Bought: WMS

Okay, for anyone who has ever wondered it a swinskin helps, I'm here to tell you that heck, yeah, these things work. The B70 PZ4TX is by far the nicest swinskin out there. Like the poster below, I wore it in the pool to test it out and was able to swim more than 5 sec faster per hundred in it. Crazy. I feel it runs true to size, as a woman 5'5 / 125, the women's medium small fits perfectly. If you have a non-wetsuit legal race coming up, you are going to want this BlueSeventy PZ4TX

Avg. ride time: 5h 26m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

Super speedy

  • Familiarity: I've put it through the wringer
  • Fit: Runs small
  • Size Bought: xl

I bought this swimskin for Ironman Kona this year. I did several open water swims in San Diego before heading to Hawaii, and this suit is much faster than bare skin. Being an average swimmer I wasn't sure how much I would really gain from a swimskin, but this one exceeded my expectations and I highly recommend it.

Awesome swimskin!

  • Familiarity: I've used it several times
  • Fit: True to size
  • Size Bought: Med

I picked up the PZ4tx for Ironman Chattanooga and was super impressed. I ended up testing it in a pool prior to race day and had a 5 sec/100 ydr drop in time. Super comfortable, easy in transition and no chaffing. Can't wait to use it at Kona next year.