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Maverick X.3
The fastest wetsuit ever.

Elite Aero Tri Suit
Wind-tunnel-tested.
Real-world-proven.

SIM Pro.3
Train smarter.

Maverick X.3
The fastest wetsuit ever.

Elite Aero Tri Suit
Wind-tunnel-tested.
Real-world-proven.

LCB Swimwear
Train like the mermaid.

T1X Transition Pack
For race day. Training day. Travel Day. Every day.

R2 Goggle
The ultimate high-performance goggle.

Maverick X.3 Thermal
The fastest cold water wetsuit ever.

Viper X.3 Ghost
Our fastest swimskin ever.

Maverick X.3
The fastest wetsuit ever.

Elite Aero Tri Suit
Wind-tunnel-tested.
Real-world-proven.

Viper X.3
The most popular swimskins in Kona.

SIM Pro.3
Train smarter. Swim faster.

R1 Goggles
Maximum forward visibility in open water.

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Women's SIM Pro.3 Buoyancy Shorts

Size: Extra Small

THIS SUIT IS DESIGNED FOR:

Triathletes and swimmers who want to train smarter, swim faster, and build lasting technique. It’s an essential for adult-onset swimmers, and a secret weapon for those with a competitive swim background.

By giving you a small assist in buoyancy at the hips, the SIM Pro.3 frees you to focus on the technical details that make you faster: timing of kick, pull, and body rotation; efficient propulsion; drag reductioninstead of fighting to keep your hips up. It helps you refine mechanics and lock in muscle memory that will pay off forever and build over time.

And it makes training more enjoyable—which means you’ll show up more often, with better focus.

This is your personal swim coach—the edge that keeps you efficient, confident, and motivated to get in the water. Train in it consistently, and you will get faster.


Size Chart Size Chart

Updated Construction

Yamamoto SCS Coated Stretch Knit - Easier to Get Solid, Snug Fit - Seals Out Water Better

Showing the seal to keep out water

Optimized Fit

Optimized Length and Leg Openings - New Female-Specific Pattern

Female swimming

Updated Graphics

Added Color Hit to Back Waistband for Improved Technique Evaluation From the Pool Deck - New Women's Colors

color on back waistband

Train Like You Race® With the SIM Pro.3 Buoyancy Shorts

The SIM is the first practical triathlon and swim training tool to mimic the body position and experience of a wetsuit swim by lifting you up — without overheating from wearing a wetsuit in an 80°F pool. This patent-pending suit is a game changer. It's better than a pull buoy, because it lets you kick and turn naturally. It's also gives just a touch of warmth for those cold morning workouts. The SIM makes every swim a race-specific training workout. Once you try it, you won't ever want to go back. Note, these shorts are designed for the pool and should have excellent durability if you rinse them after use with fresh water and dry them thoroughly.

SIM PRO.3 SIZE TIP

Fit tip: SIM Shorts are neoprene and will loosen slightly in the water. However, they do have a drawcord for adjustment.

SIM PRO.3 DETAILS

Get the Fastest Body Position

The SIM Pro.3 lifts up your hips just like a wetsuit, putting you in the fastest position possible and helping your body develop the muscle memory you need on race day. Most top wetsuit manufacturers focus on buoyancy alone.  Sure, wetsuits help lift you up, but that's not enough – and in some cases it can really get in the way of fast swimming. To get the fastest body position, you have to remove buoyancy, mass and resistance from the places you don't want it. With the SIM Pro.3, we add buoyancy to the hips and legs, creating the fastest position possible.  We also use Yamamoto's SCS coating to further reduce form drag.  We're confident you'll feel the ROKA difference as soon as you jump in the water.

Improve Your Technique

If you want to swim faster with less effort, then rotation matters a LOT.  A fast freestyle requires effective rotation along your centerline to generate power and speed in the most propulsive phase of your stroke.  The Maverick Pro leverages basic laws of physics.  We call our application of those laws "RS2" - the ROKA Speed Stripes.  It's science, and it will make you faster.

The majority of the suits on the market get this problem dead wrong.  We did a LOT of trial and testing to get this right.  Many suits, even the most expensive, add buoyancy to the lateral or outside parts of a wetsuit, but using basic physics, it's easy to see that it is the equivalent of adding weights to your cycling shoes and pedals!  It inhibits the power phase of your stroke, makes it really hard for you to rotate properly, and makes you expend more energy.  Our patent-pending suit design enhances the power phase of your stroke and encourages quick, easy rotation along your centerline.  And if you over-rotate when you swim, you will be able to feel that more easily in our suit.  All of that translates to faster swimming with less effort.

Tech Specs

Yamamoto Neoprene

For the SIM Pro.3, we use the exact same materials as its big brother, the Maverick Pro Wetsuit. This provides the exact feel you'll have on race day. "Training Like You Race" begins with developing precise muscular and neurological adaptations — the SIM Pro.3 lets you do that.

The SIM Pro.3 is 100% premium Yamamoto neoprene from Japan.  We use Yamamoto #39 SCS coated neoprene in varying thicknesses and use Yamamoto's Aerodome neoprene on the centerline (front and back).  #39 is a long-time favorite in premium triathlon suits and offers an excellent balance of performance and cost.  For the waistband, we use an advanced textile from Yamamoto to provide a better seal from water entry and folded neoprene can provide.  SCS is Yamamoto's proprietary hydrophobic surface coating.  For the centerline panel, Yamamoto Aerodome is a sandwiched neoprene that contains a perforated layer between two solid layers.  This composition traps air inside little chambers and improves buoyancy while reducing weight.  

Frequently Asked Questions (FAQ)

Q: What Is The Difference Between The SIM Pro.3 And The SIM Pro II?

There are two main updates we have made:
    1. Buoyancy: We’ve added more buoyancy to the SIM Pro.3 shorts by adding thickness in certain areas. Now your legs and hips ride a bit higher, helping SIM-ulate how a full wetsuit may feel and keep you in a better “downhill” swimming position.
    2. Comfort: We’ve tweaked the paneling and updated the internal liners of the SIM Pro.3 for a more comfortable fit across more body types.

    Q: Can I wear the SIM Pro.3 in a race?

    • The SIM Pro.3 is considered by USAT rules to be the same as a wetsuit. Therefore, you may wear the SIM Pro.3 in a race where wetsuits are permitted, but you may not wear it in a non-wetsuit race.

    Q: Can I wear the SIM Pro.3 in the pool?

    • Yes, absolutely. The SIM Pro.3 was designed for pool swimming. Just rinse it with fresh water after use and hang dry inside out.  

    SIM Size Chart

    WAIST: 23" - 25"
    HIPS: 30" - 32"
    XS
    WAIST: 25" - 27"
    HIPS: 32" - 34"
    S
    WAIST: 26" - 28"
    HIPS: 33" - 36"
    M
    WAIST: 27" - 31"
    HIPS: 37" - 40"
    L
    WAIST: 32" - 35"
    HIPS: 39" - 43"
    XL
    WAIST: 35" - 38"
    HIPS: 43" - 46"
    XXL
    WAIST: 59cm - 64cm
    HIPS: 76cm - 81cm
    XS
    WAIST: 64cm - 68cm
    HIPS: 81cm - 86cm
    S
    WAIST: 67cm - 71cm
    HIPS: 85cm - 92cm
    M
    WAIST: 71cm - 79cm
    HIPS: 93cm - 101cm
    L
    WAIST: 80cm - 89cm
    HIPS: 100cm - 109cm
    XL
    WAIST: 89cm - 96cm
    HIPS: 109cm - 117cm
    XXL

    Overall rating: 4.5367646 / 5 from 136 reviews.

    AI Generated Review Summary

    The Women's SIM Pro.3 Buoyancy Shorts are designed for triathletes and swimmers, offering improved buoyancy and speed. Customers find the quality great and the fit true to size, though some mention the size is a bit too big. The shorts help achieve proper body position in the pool and are a great training tool.

    Summary topics

    • Size Fit: 15%
    • Buoyancy: 6%
    • Product Quality: 9%
    • Fit Accuracy: 22%
    • Training Effectiveness: 6%

    Review topics: ["size","fit","quality","lines","waist","customer service","difference","legs","speed","warmth","performance","feels","shipping","pants","shorts","buoyancy","tool","position","waistband","roka","water","gear","medium","care","form","lift","swim","suit","set","workouts"].

    Review highlights

    • "Great fit, great feel and great performance!"Bobbi B.
    • "You will love the buoyancy they provide and the help in achieving the correct hips up position."Lauriewl
    • "I'm 102 lbs and small and the women's size small fits well."Laura B.

    Reviews

    Great shorts except for the waistband

    "This is my 2nd pair of the Sim Pro 3 shorts. I love these shorts; however, unlike the previous model that I had for years, the waistband on this model is very thin, and it wore out in several places. Roka replaced them under warranty, but I'm afraid these will have the same problem because the waistband is the same. I appreciate Roka's exceptional customer service, but I'd be happier to have a product that lasted as long as their old model did."

    Kimberly B. (4/5)

    Great quality and functionality.

    "Great quality and functionality. Still a bit challenging to get on but that is expected."

    elizabeth H. (5/5)

    Just The Right Warmth!

    "I am mostly an 'underwater' swimmer. I bought these for lap swimming in water temperatures in the 70s. They provide the perfect amount of warmth! And while the buoyancy is exceptional, they don't prevent me from submerging and swimming below the surface."

    Samuel H. (5/5)

    Size

    "I tried size small but it was too tight. Size medium is okay but in the water is a little big."

    Barbara M. (4/5)

    Great shorts! Great fit, great feel

    "Just what I needed, Thanks!"

    Kathleen K. (5/5)

    Not a good fit for my body

    "The shorts seem very nice and well-made, but they just absolutely did not fit. The legs were way too wide and the waistband was too small for my hips. Just not a good fit for my body so I had to return them."

    Carla B. (3/5)

    AWESOME!!!

    "I’m a new swimmer. This has really helped me address my sinking legs, unable to propel forward and focus on my form with th least amount of effort"

    Abigail M. (5/5)

    Excellent aftercare

    "I had a problem with the sim pro3, ROKA sorted my issue out as soon as I got in touch, very good interaction and excellent aftercare , highly recommend ROKA"

    Gary P. (5/5)

    Game changer! They really are

    "Game changer! They really are buoyant. Worth every penny."

    Jeri A. (5/5)

    "La calidad del pantalón, a simple vista, es espectacular y estéticamente muy bonito. El corte es perfecto, salvo el talle, que resulta excesivamente bajo. Sin embargo, el sistema de ajuste de la cintura mediante cordon lo mantiene en su sitio durante la sesion, sin que se baje más. En cuanto al efecto de flotabilidad, es maravilloso. De momento, lo he probado solo en piscina. Sientes que te eleva las caderas hacia la superficie y eso te permite centrarte en entrenar la técnica sin el esfuerzo de la batida de pies. Talla pequeño. A mi la talla S me queda muy ajustada pero no me limita la movilidad durante el entrenamiento. Como referencia, mido 162 cm, peso 54 kg, cintura 65 cm y cadera 89 cm. En conjunto, encantada con la compra."

    Maria J. (5/5)

    Q&A

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