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Blueseventy Nero XII Men's Jammer

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Product Rating   Product Rating  6 customer reviews|83% say true to size
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SKU: 12S3JM01
Product Code: 38058

Availability: Usually Ships in 24 Hours
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The Nero XII Jammer is designed for the best competitive athletes in the world. It excels in the two most important factors of a jammer: fit and compression. The Nero XII fabric is designed to reduce drag, streamline body position, and improve performance. • Patented seam welding technology: - Welded seams create 50% less drag than a conventional over locked stitched seam. - Lock seam: 3 layer folded bonding technique. • 3-dimensional anatomically refined fit. • Internally welded core stability panels: - Internal panels support abdominal function and enable you to hold a better body position in the water. • Nero XII fabric: - Enhanced compression, improved power, and elasticity. - Lightweight. - 56% more compressive fabric. - Double the fiber percent than a standard performance suit. - Increased lateral compressive force. - Increased stretch in the vertical direction to improve range of motion. • Imported.

For a detailed review by Gold Medalist Mark Gangloff click here

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  • 4.5 star rating (Based on 6 Reviews)
    83% of Fit Survey Respondents said this item "Feels true to size"
    17% of Fit Survey Respondents said this item "Feels too big"

    Write A Review
  • rating star
    By from
    on 7/29/2013
    Feels too big

    this suit overall is an amazing suit and i dropped tons of time in it. For example i dropped about a second and a half on my 100 free! the suits water repellent power ran out in about one and a half big meets (15 to 20 races). but the compression is still working after five big meets! the only negative  thing i have found about this suit so far is the fit around the waist. when i am swimming breast stroke or doing flip turns the suit seems to balloon up with water. so you either have to size down this suit 2 to 3 sizes smaller than your practice suit. For your suit to last longer you should soak it in cold water after every meet. In all this is a great suit but just remember to size down and tie the drawstrings real tight before every race.

  • rating star
    By from
    on 7/28/2012
    Feels true to size

    This suit is amazing! I swam today in the 100 breastroke for divisional's and dropped 3 seconds off my time, from a 1:18.5 m to a 1:15.5 m. If your a breastroker, look no further, this is the suit for you. If deciding between a Speedo FS3 or Blueseventy Nero X2, go with this suit, you will not regret the decision. I also believe that Blueseventy makes this product with more care than Speedo does to the FS3 (That's my opinion at least).

  • rating star
    By from
    on 5/5/2012
    Feels true to size

    I got this suit for my championship meet this year and i couldnt be any happier. They made the fabric thicker and much more durable, and made the inner lining bigger and more comfortable. It compressed excellently and did everything i had hoped. Ive had arena, finis, tracer, and an FS pro. This suit surpasses any of them, though it is more money, i think it is definitely worth it. Oh and look at the size chart before buying, you should definitley size down, im a big guy, around 200 pounds and i got a 30.

  • rating star
    By from
    on 4/11/2012
    Feels true to size

    Better priced than its competitors and of greater VALUE! the XII is thicker and better fitting than the older model. by far the best fitting competition suit i have ever worn! plus the this suit features a high waist, which really help keep water out of the suit! A MUST BUY!

  • rating star
    By from
    on 3/3/2014
    Feels true to size

    My son wears a 22 aqua blade suit.  It was wearing out so we upgraded to this one.  He took a size 20 in this one.  It fit great but he had to jump in warm up pool before each swim so we could get it tied tight enough.  My son wore it for a state meet and dropped 2-19secs in all of his events.  The only issue he had is the suit is short in crotch and the seam sits very far forward compared to most racing suits he tried on.  This one did cause a little discomfort in the crotch area but once it got wet it didn't bother him during the races.  I would buy again as my son loved how sleek and water resistant it felt in the water.

  • rating star
    By from
    on 1/29/2013
    Feels true to size

    I purchased the Nero II after previously wearing and loving the TX I. I felt no "obvious" different in the two suits, if anything I would consider the first one to be as good if not a little better. Still a great suit just not anything hugely different from the first.


Blueseventy, named for the fact that 70% of the Earth's surface is covered by water, has manufactured the highest quality competition suits since 1993. By focusing entirely on producing advanced wetsuits, swim skins, accessories and goggles designed for competition swimmers, blueseventy has successfully developed a reputation as the industry leader in competition suits for triathlon and Ironman events. The advanced hydrophobic materials found in blueseventy's open water competition swim skins have now found their way into pool suits as well, allowing swimmers of all types to experience the competitive advantage of blueseventy's suits. By relentlessly concentrating on producing such specialized, high-performance products, the blueseventy brand is now the highest selling wetsuit brand in the USA.