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TYR Solid Durafast One Diamondback Workout Bikini Swimsuit Set

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Product Details
Product Code: 3638

TYR's exclusive collection of 100% Polyester training suits last three times longer than traditional Lycra. The quick-drying Durafast material of the TYR Solid Durafast Diamondback Workout Bikini Swimsuit Set offers minimal moisture absorption and is soft, comfortable and easy on the skin. It has remarkable shape retention and memory thanks to a unique fabrication blend of polyester and PBT. In fact, not only is PBT a textured polyester yarn that has natural stretch characteristics, but it also provides exceptional chlorine resistance, refuses to fade and has a UPF 50+ rating for ultimate sun protection. Imagine that? A training suit that works as hard as you do.


  • Women's two-piece swimsuit.
  • UPF 50+ sun protection.
  • Front lined: For added coverage.
  • TYR logo at chest.


  • Fabric: 100% Polyester PBT.
  • Care: Hand wash, cold. Line dry.
  • Sun Protection: UPF 50+
  • Closure: Pull-on
  • Chlorine Resistant: Yes
  • Back Style: V-back
  • Fit: Performance
  • Adjustable: No
  • Bottom Coverage: Moderate
  • Country of Origin: Imported


Product Reviews

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Most Helpful Most Recent

Pretty Close to Perfect

by Traci

From Arizona on 6/29/2010

Fit: Feels true to size

I was skeptical about getting this suit as I have a hard time finding things that fit "off the rack". This suit fits pretty close to perfect. The bottoms are perfect. Not overly tight, just perfectly snug and have a draw string that cinches them comfortably in place. The top is a little big on me but it's not noticeable, I can just tell it's not real snug (the straps feel a bit too long). I just pull it down in the back to make up for the extra strap length. I use it for swimming on the Master's. For anybody who needs some specifics, I'm 5'5", 125# w/ measurements of 35-26-36. I ordered a medium. Hope that helps.

Fits well and I am happy with my purchase

by Novice Swimmer

From New York, NY on 8/16/2015

Fit: Feels true to size

Adjustable string for the bottom to tighten before a swim. The sizing was a bit tough because according to the chart my chest is a large and my waist a small. The medium was a safe and good choice. A large top would have been too big and since the bottom is adjustable with the string I do not have any complaints about the size. I swim and have washed it often and the material is holding up very well

Great for lap swimming

by TJL

From Rocky Mountains on 3/13/2019

Fit: Feels true to size

Fits great and stays put in and out of the water.  I'm 5'8 140 pounds, ordered a M

Lasts over a year with solid 2-3x/wk chlorine swimming


From Kalispell, MT on 4/11/2018

Fit: Feels true to size

After over a year of use, I'm still using this 100% polyester (plastic) suit for 1-1.5 hour competition practices. The suit is only starting to turn white along one edge of the bottom and is slightly bigger than new, especially where the black is turning white. Only complaint is that I want more options for style and color.

Exactly What I Wanted

by Arielle

From San Jose, CA on 12/22/2016

Fit: Feels true to size

This swimsuit is exactly what I was looking for! I was a little concerned at first about the absence of a padding in the bra piece, but now that I have tried it on, I'm not too worried anymore. I was looking for a nice two piece swim suit that was a little more modest than what you would typically find in a two piece and that covered more of the backside than what is "trending" nowadays. I like to be more active than those that only want a nice tan on the beach. I have a larger bum than most, and I can say I am happy with the amount of coverage in this suit! I would purchase again :)

Great coverage in a 2-piece

by JenL

From Framingham, MA on 7/27/2015

Fit: Feels true to size

My daughter wanted a 2-pc for summer swim team practices, and to wear under her wetsuit in open water racing.  She is a larger girl, and busty, so most of the 2-pc training suits looked too small in the top.  This one is great!  Fits well and looks good, and offers decent coverage and support.  She wants another one (in red) for lifeguarding!

Excellent suit

by Mistie

From FL on 12/28/2017

Fit: Feels true to size

Great fit, comfortable material.

Great training suit!

by oldswimmer

From Bolivar, OH on 6/15/2016

Fit: Feels true to size

Suit fits great, very comfortable for swimming long workouts, good price!

Great buy!

by Laura

From Sacramento, CA on 7/16/2011

Fit: Feels true to size

I use this suit to teach swim lessons and it works great! Although it does fit true to size, I am pear shaped. So the top is a little big and the bottom fits just fine. So I do wish I could buy different sizes for top and bottom.

Perfect true size!

by Malu

From Florida on 2/21/2020

Great product!

Weird Fit

by KM

From San Diego on 12/31/2020

Unless you're a stick figure with no muscle or curves, this is tight and too small in a weird way while also being slightly big, just weird. I expect better from a company that specializes in swimwear. Returning.

Cute but runs Small

by Felicia

From Kailua Kona on 12/27/2020

I ordered Medium in looking at measurements but upon receipt it became obvious I needed a Large.

My favorite workout suit!

by Kathy

From Austin, TX on 11/22/2020

Great Fit. Great Coverage.  Perfect for lap swimming.


by sally

From Portland OR on 7/13/2020

The top was too big and the bottoms were too small.


by Jennifer

From New Jersey on 7/5/2020

Supportive and can easily run and bike in this. Wear under my try suit.

Triathlon swim

by Newbie Triathlete

From Irvine CA on 5/12/2020

I purchased 2 of these suits. I would recommend sizing up. The drawstring makes the bottoms snug but the top doesn’t offer enough coverage for me. 34D. I ordered the large. These are well made and will work well to get some sun on the belly!

Perfect true size!

by Malu

From Florida on 2/21/2020

Great product!

Great fit

by DG

From Hawaii on 12/5/2019

Fit: Feels true to size

Fast shipping to Hawaii. Fits great.

Love this suit....

by Sherry

From Plattsburgh NY on 11/27/2019

Love the way this suit only disappointment is that it doesn’t come in a variety of colours...
No complaints, I’ve worn this suit style for years..

Good coverage yet still sexy

by Jeanne

From Woodland Hills, CA on 11/13/2019

I wear this under my wetsuit, but that said, I think I’m gonna wear it just hanging out too. Really well-made. Really really satisfied. Very comfortable.

Read More Reviews

Questions & Answers

Need an answer fast? Contact our customer service team.

The TYR Solid Durafast One Diamondback Workout Bikini Swimsuit Set bottoms do have a drawstring. 

Answered by
on 8/10/2017

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The TYR Solid Durafast One Diamondback Workout Bikini Swimsuit Set is sold as a Top and Bottom Set and is not available for individual purchase. 

Answered by
on 10/17/2017

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The TYR Solid Durafast One Diamondback Workout Bikini Swimsuit Set is fully lined but does not have padding. 

Answered by
on 10/19/2017

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As a 32 + 34 would range from a small to a medium in this particular suit, we would highly recommend obtaining your measurements so that you may compare them to the sizing chart here.

Answered by
on 10/4/2018

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About This Brand


Founded in Southern California in 1985, TYR™ has since developed a reputation for high-quality products and equipment. TYR competition swimwear and triathlon gear have been a dominant force in their respective industries. The company is also known for its TYR goggles, swim apparel, triathlon wetsuits and a wide variety of swimming equipment.

TYR was the first company to introduce a pair of goggles designed to fit a woman's face (the TYR T-72). TYR was also responsible for the famous red bathing suits featured on the hit television series "Baywatch." TYR consults with current and former athletes when developing its products. Swimmers know that TYR is a leader in swimsuits, warm-up suits, and swim training equipment. The TYR Tracer Series is one of the most advanced technical suit lines on the market. The TYR Hurricane wetsuits and the TYR Torque collections include top-of-the-line suits for the competitive swimmer.

TYR has also moved into competitive running equipment. From running shirts to shorts, its apparel is designed with the runner in mind. Built with moisture wicking fabric and antimicrobial material, TYR running apparel is designed to give the athlete the most comfortable, dry clothing on the market.

The name "TYR" is derived from the Norse god of warriors, who is said to have embodied victory and glory. Much the same can be said about the athletes who started TYR. Executive Vice President, Steve Furniss, was an Olympian who competed in the 1972 and 1976 Summer Games, and captained the 76th U.S. Olympic Swim Team.