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The World's Finest Triathlon Gear - Since 1990

T1 First Wave Concept 5 Pullover

Regular price $ 340.00 Sale price $ 440.00

Unit price per 



  MSRP:  $440

Please Note - EXCHANGES ACCEPTED, BUT NO REFUNDS. These are discontinued models at discounted prices, therefore we will accept exchanges, within 30 days, for different sizes or different wetsuit models, based on availability.

Sizing: Please refer to the size chart button above for sizing guidance by gender. If in doubt, email questions to  

The two-piece design of the T1 Wetsuits offer more comfort and less restriction. Because the top and bottom are not attached, you have much more freedom of movement and there is no “torso-rubber stretch” or shoulder fatigue that occurs with one-piece wetsuits. All T1 models are sold as separates for a more customized and personal fit. With up to seven sizes of tops and bottoms, you have 49 possible size combinations from which to choose. Other features we innovated many years ago include lower necklines and thicker rubber in the legs and hips to help float the largest bones and muscles in the body. More floatation here means more speed. T1 Wetsuits are not filled with gimmicks, just physics.

New Features:

  • Zipper is lighter weight and corrosion resistant
  • Less-toxic bonding agent for people with skin sensitivities

Carry Over Features:

  • Flexible 2mm body and 5mm arms with a lower neckline for comfort.
  • BIO-STROKE design puts your arms into a forward rotated shoulder position for a more efficient swim stroke.
  • YKK® custom zipper is small, lightweight, and makes removal easier than ever.
  • GreenGoma™ #9 Rubber with Super Composite Skin makes the First Wave the warmest, fastest, most durable, flexible, buoyant, and the most comfortable wetsuit in the world today.
  • Lined with 4-Way stretch Nylon Lycra® for comfort and to minimize chafing
  • Seams are glued and blind-stitched, making them more durable than the rubber itself
  • Sleek graphics, no gimmicks
  • Sold as separates for a true customized fit
  • Sustainability is extremely important to De Soto, click here to learn how we are making a difference
  • T1 Wetsuits 100% Satisfaction Guarantee 
  • T1 Wetsuit product care and FAQs
  • Chlorine resistant treatment, but not recommend for repeated use in chlorinated water.

If your arms are bigger, you'd swim faster! If you could float more, you'd swim faster! This pullover incorporates both concepts and is legal in WTC & USAT events. T1 First Wave Concept 5 and T1 First Wave Pullovers are identical with the exception of the sleeve thickness. Concept 5 has 5 mm sleeves and First wave has 2mm sleeves. The difference is like adding about 3-4 additional fingers of surface area to each hand. The best way to see how significant that difference would be is to try swimming with just one or two of your fingers open and the others bent down.

Whether you like to swim for exercise or are on the swim course of a Triathlon, T1 Wetsuits offer you speed, comfort and buoyancy that will make swimming pure pleasure!


Customer Reviews
5.0 Based on 5 Reviews
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Jodi P.
United States

Best customer service hands down

We are beyond pleased with all of our De Soto gear. Our experience with this purchase far exceeded all our shopping experiences from any other company. We were contacted by their customer service department because they felt we would be happier with a similar but different product. They gave us their recommendation and offered to give us the same deal for their recommended product. They went out of their way to be sure we were completely satisfied with our purchase. Thanks De Soto for all you do!

richard l.

Amazing Customer Service!!!

I purchased a T-1 Black pearl two piece wet suit 9 years ago when I started doing triathlons. It has served me very well over the years, including one world age group championship appearance in London, England in 2013. Then this fall, a seam on the pullover piece split. I emailed DeSoto and Emilio DeSoto himself emailed me back and offered me a substantial discount on a replacement! I will always trust DeSoto for quality products and amazing customer service!!

Olivier J.

No pain, lots of gain

Used the T1 concept 5 for Ironman and quickly forgot I was in a wetsuit. No shoulder pain at all and plenty of flotation support that helped me through the swim. The wetsuit is very easy and quick to take off but I also like the fact that it is very easy to put on. When there is a rolling start for the swim one has to wait for a while in the starting blocks, and in order to not overheat during that period I zip down the wetsuit at the last minute: very easy and no stress; I would not do this with a traditional wetsuit.

John H.

Best Wetsuit Ever!

I tried 5 difference wetsuit before I purchased my T1 from Desoto. I had struggled with zipping up the back of my 1 piece wetsuits by myself and I wondered if I could do this one on my own. I can. I don't have the feeling that I am doing a resistance workout with each stroke like I did in other full and bib one piece suits. This is a great product and the only wetsuit I will own from now on.

United States

First Wave Concept 5

Quality of this wetsuit is hard to exaggerate. Tight to get on, especially first time, but feels like a second skin that it really buoyant and fast in the water. I'd used a rental De Soto Black Pearl wetsuit in a prior race; cannot wait to race in my own personal First Wave Concept 5.

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