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MEN'S GEAR

Maverick X.3
The fastest wetsuit ever.

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

SIM Pro.3
Train smarter.

WOMEN'S GEAR

Maverick X.3
The fastest wetsuit ever.

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

LCB Swimwear
Train like the mermaid.

NEW RELEASES

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

BESTSELLERS

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.

R2 Goggles
Maximum forward visibility in open water.

Read the Field Report

LATEST POST:
Catherine Breed's 900-Mile Ocean Swim

IRONMAN water temperatures wetsuit legal

FEATURED:
Water Temp for Every IRONMAN and 70.3 Race

SAME SPEED, LESS MONEY

Great deals on past-season and open-box gear.

THE OUTLET

Wetsuits Outlet

Swimskins Outlet

Run Apparel Outlet

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Women's Viper X.3 Swimskin - Sleeveless
Women's Viper X.3 Swimskin - Sleeveless
Women's Viper X.3 Swimskin - Sleeveless
Women's Viper X.3 Swimskin - Sleeveless

Women's Viper X.3 Swimskin - Sleeveless

$425
Size: Extra Small

THIS SWIMSKIN IS DESIGNED FOR:

Elite speed + max freedom in non-wetsuit races—for athletes who prefer a sleeveless suit.

The Viper X.3 Sleeveless delivers front-pack, elite performance with more freedom than ever before. Patented IXI™ internal streamline support stabilizes your core and connects your hips to your shoulders—helping you stay streamlined and convert rotation into power and speed. Paired with an all-new ultralight, hyperflexible hydrophobic textile and seamless, laser-bonded construction, it's the freest, most comfortable version of our top-end Viper yet.

WHAT'S A SWIMSKIN? AND WHEN TO HAVE ONE.

Swimskins are used in warm water races (above 76.1°F / 24.5°C) when wetsuits aren’t legal. They reduce drag by covering your tri kit with an ultra fast, hydrophobic layer—and will save you several minutes in the water.

Because race-day water temps can swing by a few degrees, it’s smart to pack a swimskin for any race where water is expected to be over 70°F / 21°C.

Wondering the water temp for your race? This page shows the average historical water temperature for every IRONMAN and IRONMAN 70.3 race in the world. 

Size Chart Size Chart

What you'll feel

What you'll feel

That “shaved and tapered” easy speed as you knife through the water thanks to advanced hydrophobic textiles and laser bonded seams. A sharper, more connected stroke—powered by ROKA’s IXI™ internal streamline support and textiles, linking your hips to your shoulders for better power transfer and efficient rotation. Nothing to fight. Just pure speed.

That “shaved and tapered” easy speed as you knife through the water thanks to advanced hydrophobic textiles and laser bonded seams. A sharper, more connected stroke—powered by ROKA’s IXI™ internal streamline support and textiles, linking your hips to your shoulders for better power transfer and efficient rotation. Nothing to fight. Just pure speed.

Who it's built for

Who it's built for

Athletes looking to stay sleeveless while squeezing every second out of their swim, or athletes wearing a sleeveless tri kit.

Less experienced swimmers—will benefit from the extra core support in X.3 models to reduce "snaking" in the water.

Athletes racing long course—will benefit from the extra body line support and comfort in X.3 models as core muscles fatigue deep into the swim.

Athletes looking to stay sleeveless while squeezing every second out of their swim, or athletes wearing a sleeveless tri kit.

Less experienced swimmers—will benefit from the extra core support in X.3 models to reduce "snaking" in the water.

Athletes racing long course—will benefit from the extra body line support and comfort in X.3 models as core muscles fatigue deep into the swim.

What makes it fast

What makes it fast

  1. IXI™ Internal Streamline Support—Patented core support taping keeps your body straight and connects your hips to your shoulders, improving efficiency and power transfer.
  2. All-New Stretch-Woven Italian Textile—More comfort and flexibility than ever, and strategic compression smooths wrinkles from your tri kit, limiting form drag.
  3. Hydrophobic Coating—Repels water and reduces surface drag and absorption.
  4. Laser-Cut Bonded Seams—Improves comfort (no stitching!) and reduces surface drag.
  5. Quick Release Auto-Lock YKK Zipper—Eliminates lanyard, reducing drag. Quick release ensures a lightning fast T1: flip down to lock; flip up to release.
  6. Silicone Leg Grippers—Printed silicone on inside of leg opening for a straight seam cut and no sausage leg.
  1. IXI™ Internal Streamline Support—Patented core support taping keeps your body straight and connects your hips to your shoulders, improving efficiency and power transfer.
  2. All-New Stretch-Woven Italian Textile—More comfort and flexibility than ever, and strategic compression smooths wrinkles from your tri kit, limiting form drag.
  3. Hydrophobic Coating—Repels water and reduces surface drag and absorption.
  4. Laser-Cut Bonded Seams—Improves comfort (no stitching!) and reduces surface drag.
  5. Quick Release Auto-Lock YKK Zipper—Eliminates lanyard, reducing drag. Quick release ensures a lightning fast T1: flip down to lock; flip up to release.
  6. Silicone Leg Grippers—Printed silicone on inside of leg opening for a straight seam cut and no sausage leg.

Specs at a Glance

Select up to Three Models & Compare Features

VIPER SWIMSKIN Size Chart

FIT TIPS

  • Swimskins should fit snugly but comfortably without inhibiting your breathing or arm movement. Fit may feel different while swimming vs. on land, so make sure to try the suit in the water. They are meant to have a tight, compression fit, like a competition pool swimming suit.
  • Note that swimskins are meant to be worn on top of a race top/bottom or race suit only for the swim portion of the race. They are very specific, high performance garments not meant to be worn alone like traditional swimwear and the suits can be see-through under certain light or when wet. Undergarments such as a tri kit or swimsuit are strongly advised.
  • Your race kit will affect the fit slightly, so please be sure to try them on and swim in them with your race kit or another suit underneath.
Select your height, then locate your suggested size based on your weight.
ENGLISH
METRIC
Select Your Height
≤4'11"
5'0'
5'1"
5'2"
5'3"
5'4"
5'5"
5'6"
5'7"
5'8"
5'9"
5'10"
5'11"
6'0"+
≤4'11"
95 - 99 LBS
XS
100 - 104 LBS
XS
105 - 109 LBS
S
110 - 114 LBS
S
5'0"
95 - 99 LBS
XS
100 - 104 LBS
XS
105 - 109 LBS
S
110 - 114 LBS
M
115 - 119 LBS
M
120 - 124 LBS
ML
5'1"
95 - 99 LBS
XS
100 - 104 LBS
XS
105 - 109 LBS
S
110 - 114 LBS
M
115 - 119 LBS
M
120 - 124 LBS
ML
125 - 129 LBS
ML
5'2"
95 - 99 LBS
XS
100 - 104 LBS
S
105 - 109 LBS
S
110 - 114 LBS
M
115 - 119 LBS
M
120 - 124 LBS
ML
125 - 129 LBS
ML
130 - 134 LBS
ML
5'3"
95 - 99 LBS
XS
100 - 104 LBS
S
105 - 109 LBS
S
110 - 114 LBS
M
115 - 119 LBS
M
120 - 124 LBS
M
125 - 129 LBS
ML
130 - 134 LBS
ML
135 - 139 LBS
ML
5'4"
100 - 104 LBS
S
105 - 109 LBS
S
110 - 114 LBS
M
115 - 119 LBS
M
120 - 124 LBS
M
125 - 129 LBS
ML
130 - 134 LBS
ML
135 - 139 LBS
ML
140 - 144 LBS
L
145 - 149 LBS
L
5'5"
100 - 104 LBS
ST
105 - 109 LBS
ST
110 - 114 LBS
ST
115 - 119 LBS
M
120 - 124 LBS
M
125 - 129 LBS
M
130 - 134 LBS
ML
135 - 139 LBS
ML
140 - 144 LBS
L
145 - 149 LBS
L
150 - 154 LBS
XL
5'6"
100 - 104 LBS
ST
105 - 109 LBS
ST
110 - 114 LBS
ST
115 - 119 LBS
ST
120 - 124 LBS
M
125 - 129 LBS
M
130 - 134 LBS
ML
135 - 139 LBS
ML
140 - 144 LBS
L
145 - 149 LBS
L
150 - 154 LBS
XL
155 - 159 LBS
XL
5'7"
105 - 109 LBS
ST
110 - 114 LBS
ST
115 - 119 LBS
ST
120 - 124 LBS
MT
125 - 129 LBS
MT
130 - 134 LBS
MT
135 - 139 LBS
L
140 - 144 LBS
L
145 - 149 LBS
L
150 - 154 LBS
XL
155 - 159 LBS
XL
160 - 164 LBS
XL
5'8"
110 - 114 LBS
ST
115 - 119 LBS
ST
120 - 124 LBS
MT
125 - 129 LBS
MT
130 - 134 LBS
MT
135 - 139 LBS
L
140 - 144 LBS
L
145 - 149 LBS
L
150 - 154 LBS
XL
155 - 159 LBS
XL
160 - 164 LBS
XL
5'9"
115 - 119 LBS
MT
120 - 124 LBS
MT
125 - 129 LBS
MT
130 - 134 LBS
MT
135 - 139 LBS
L
140 - 144 LBS
L
145 - 149 LBS
L
150 - 154 LBS
XL
155 - 159 LBS
XL
160 - 164 LBS
XL
165 - 169 LBS
XXL
170 - 174 LBS
XXL
5'10"
115 - 119 LBS
MT
120 - 124 LBS
MT
125 - 129 LBS
MT
130 - 134 LBS
MT
135 - 139 LBS
LT
140 - 144 LBS
LT
145 - 149 LBS
LT
150 - 154 LBS
XL
155 - 159 LBS
XL
160 - 164 LBS
XL
165 - 169 LBS
XL
170 - 174 LBS
XXL
175 - 179 LBS
XXL
5'11"
125 - 129 LBS
MT
130 - 134 LBS
MT
135 - 139 LBS
LT
140 - 144 LBS
LT
145 - 149 LBS
LT
150 - 154 LBS
LT
155 - 159 LBS
XL
160 - 164 LBS
XL
165 - 169 LBS
XL
170 - 174 LBS
XXL
175 - 179 LBS
XXL
180 - 185 LBS
XXL
6'0"+
135 - 139 LBS
LT
140 - 144 LBS
LT
145 - 149 LBS
LT
150 - 154 LBS
LT
155 - 159 LBS
LT
160 - 164 LBS
XL
165 - 169 LBS
XL
170 - 174 LBS
XXL
175 - 179 LBS
XXL
180 - 185 LBS
XXL
Select Your Height
≤150cm
152cm
155cm
158cm
160cm
163cm
165cm
168cm
170cm
173cm
175cm
178cm
180cm
183cm+
≤150cm
43 - 45 KG
XS
45 - 47 KG
XS
48 - 49 KG
S
50 - 52 KG
S
152cm
43 - 45 KG
XS
45 - 47 KG
XS
48 - 49 KG
S
50 - 52 KG
M
52 - 54 KG
M
54 - 56 KG
ML
155cm
43 - 45 KG
XS
45 - 47 KG
XS
48 - 49 KG
S
50 - 52 KG
M
52 - 54 KG
M
54 - 56 KG
ML
57 - 59 KG
ML
158cm
43 - 45 KG
XS
45 - 47 KG
S
48 - 49 KG
S
50 - 52 KG
M
52 - 54 KG
M
54 - 56 KG
ML
57 - 59 KG
ML
59 - 61 KG
ML
160cm
43 - 45 KG
XS
45 - 47 KG
S
48 - 49 KG
S
50 - 52 KG
M
52 - 54 KG
M
54 - 56 KG
M
57 - 59 KG
ML
59-61 KG
ML
61-63 KG
ML
163cm
45 - 47 KG
S
48 - 49 KG
S
50 - 52 KG
M
52 - 54 KG
M
54 - 56 KG
M
57 - 59 KG
ML
59 - 61 KG
ML
61 - 63 KG
ML
63 - 65 KG
L
66 - 68 KG
L
165cm
45 - 47 KG
ST
48 - 49 KG
ST
50 - 52 KG
ST
52 - 54 KG
M
54 - 56 KG
M
57 - 59 KG
M
59 - 61 KG
ML
61 - 63 KG
ML
63 - 65 KG
L
66 - 68 KG
L
68 - 70 KG
XL
168cm
45 - 47 KG
ST
48 - 49 KG
ST
50 - 52 KG
ST
52 - 54 KG
ST
54 - 56 KG
M
57 - 59 KG
M
59 - 61 KG
ML
61 - 63 KG
ML
63 - 65 KG
L
66 - 68 KG
L
68 - 70 KG
XL
70 - 72 KG
XL
170cm
48 - 49 KG
ST
50 - 52 KG
ST
52 - 54 KG
ST
54 - 56 KG
MT
57 - 59 KG
MT
59 - 61 KG
MT
61 - 63 KG
L
63 - 65 KG
L
66 - 68 KG
L
68 - 70 KG
XL
70 - 72 KG
XL
72 - 74 KG
XL
173cm
50 - 52 KG
ST
52 - 54 KG
ST
54 - 56 KG
MT
57 - 59 KG
MT
59 - 61 KG
MT
61 - 63 KG
L
63 - 65 KG
L
66 - 68 KG
L
68 - 70 KG
XL
70 - 72 KG
XL
72 - 74 KG
XL
175cm
52 - 54 KG
MT
54 - 56 KG
MT
57 - 59 KG
MT
59 - 61 KG
MT
61 - 63 KG
L
63 - 65 KG
L
66 - 68 KG
L
68 - 70 KG
XL
70 - 72 KG
XL
72 - 74 KG
XL
75 - 77 KG
XXL
77 - 79 KG
XXL
178cm
52 - 54 KG
MT
54 - 56 KG
MT
57 - 59 KG
MT
59 - 61 KG
MT
61 - 63 LBS
LT
63 - 65 KG
LT
66 - 68 KG
LT
68 - 70 KG
XL
70 - 72 KG
XL
72 - 74 KG
XL
75 - 77 KG
XL
77 - 79 KG
XXL
79 - 81 KG
XXL
180cm
57 - 59 KG
MT
59 - 61 KG
MT
61 - 63 KG
LT
63 - 65 KG
LT
66 - 68 KG
LT
68 - 70 KG
LT
70 - 72 KG
XL
72 - 74 KG
XL
75 - 77 KG
XL
77 - 79 KG
XXL
79 - 81 KG
XXL
82 - 84 KG
XXL
183cm+
61 - 63 KG
LT
63 - 65 KG
LT
66 - 68 KG
LT
68 - 70 KG
LT
70 - 72 KG
LT
72 - 74 KG
XL
75 - 77 KG
XL
77 - 79 KG
XXL
79 - 81 KG
XXL
82 - 84 KG
XXL

Overall rating: 5.0 / 5 from 3 reviews.

AI Generated Review Summary

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    Review highlights

      Reviews

      Excelente Producto!!

      "El diseño es hermoso y el producto es de una calidad excelente. El ajuste es perfecto y no roza, ni siquiera en el primer uso. Lo recomiendo ampliamente!"

      — Diana D. (5/5)

      Haven't raced in this suit yet

      "I tried to get into the open water timely, but there were riptides and 3-5 foot swells before the 14 day return period. After 16 days, I was able to swim half mile in the open water and I had no discomfort. I did swim 8 seconds faster per 100 yards, but I don't know if that was the sweep or the swim skin. Racing in Miami, FL on 11/9. That will be the test."

      — Jeanette M. (5/5)

      Big kids can wear Roka too

      "As a muscular female, I always want a review to tell me if I can fit in something. Here’s what I got for you. Go with Roka sizing suggestion. I’m 5’6” 155lbs. Muscular broad shoulders and thick thighs and hips. I normally wear a Large bottom, medium tops in a variety of brands. With this swim skin I got an XL and it’s perfect just as Roka suggested. I did go sleeveless which helped. Nice and tight as it should be, takes a little working over my hips and buttock but it fits like a glove! Keep in mind, there is no string for the zipper which is no issue when taking it off as it comes down easily. However, you need help zipping it up to get it on. I can’t by myself but in a race setting you’ll have plenty of people to help you. Performance wise it does what it’s going to do. Not meant to float you so don’t expect that. It’s not a wetsuit. Keeps the drag low, repels the water and I barely know I have it on. Plan to wear this in a full Ironman this month and so far in IM distance swims I think the extra core/back support is helpful. If you’re on the fence, I think it’s worth it to feel confident in your swim without a wetsuit."

      — Elizabeth H. (5/5)

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