Athlete-Approved. Performance Proven.
Casper Stornes Chooses Zone3
Casper Stornes is the reigning Ironman World Champion, the most respected title in triathlon.
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12 Months Warranty
Free Shipping over £175*
Expert Support
Easy Exchanges
12 Months Warranty
Athlete Approved
Performance proven
New Arrivals
New Arrivals
The latest in performance. Explore our newest wetsuits, triwear, and swimwear innovations.
Performance. Backed by evidence
Independent testing at Loughborough Sport evaluated three athletes — beginner, intermediate, and advanced — across four 750 m swims each, with and without Zone3 wetsuits.
Averaged results demonstrated measurable improvements in efficiency, speed, and physiological response across all suits, with outcomes varying by individual.
Women's Vanquish-X Wetsuit
Women's
Wetsuits
The new Vanquish-X takes performance to a completely new level. Highly regarded as one of the best triathlon wetsuits in the world, the key selling features of the Vanquish have not changed. This wetsuit is designed for triathletes looking to get the most out of their performance and feeling fresh before getting on the bike.
Available Sizes:
XS
S
ST
M
L
XL
$949.00
Vanquish-X Wetsuit
Men's
Wetsuits
The new Vanquish-X takes performance to a completely new level. Highly regarded as one of the best triathlon wetsuits in the world, the key selling features of the Vanquish have not changed. This wetsuit is designed for triathletes looking to get the most out of their performance and feeling fresh before getting on the bike.
Available Sizes:
S
ST
SM
M
MT
XL
$949.00
Vision Wetsuit
Men's
Wetsuits
Awarded Best Triathlon Wetsuit of 2024 by Triathlete.com, the Vision Wetsuit is a benchmark in performance and sustainability. Featuring B-Prene, a biodegradable Yamamoto neoprene, it delivers superior flexibility, buoyancy, and speed while significantly reducing environmental impact. Whether a beginner or a seasoned swimmer, the Vision is designed to maximize efficiency & comfort in open water.
Available Sizes:
S
SM
ST
M
ML
MT
L
XL
XXL
$545.00
Women's Vision Wetsuit
Women's
Wetsuits
Awarded Best Triathlon Wetsuit of 2024 by Triathlete.com, the Vision Wetsuit is a benchmark in performance and sustainability. Featuring B-Prene, a biodegradable Yamamoto neoprene, it delivers superior flexibility, buoyancy, and speed while significantly reducing environmental impact. Whether a beginner or a seasoned swimmer, the Vision is designed to maximize efficiency & comfort in open water.
Available Sizes:
XS
S
SM
ST
M
ML
L
XL
$545.00
Men's Agile Wetsuit
Men's
Wetsuits
If you’re new to open water swimming or triathlon, the Agile Wetsuit is the companion you need to keep your body warm, comfortable and supported through the beginnings of your open water journey.
Available Sizes:
S
ST
SM
M
MT
ML
L
XL
XXL
$289.00
Women's Agile Wetsuit
Women's
Wetsuits
If you’re new to open water swimming or triathlon, the Agile Wetsuit is the companion you need to keep your body warm, comfortable and supported through the beginnings of your open water journey.
Available Sizes:
XS
S
ST
SM
M
ML
L
XL
XXL
$289.00
About Us
Zone3 exists to help people perform in the water, designing athlete-approved products that support confidence, progression and performance across swim and triathlon.
Our Innovation
Innovation at Zone3 is driven by performance, developed through testing, refined in the water, and designed to help athletes move faster, further and with greater efficiency.
Our Responsibility
From materials to manufacturing, we make considered choices to reduce impact while maintaining the performance, durability and confidence athletes expect.
EXTRA WARMTH
Extend your season. Insulated swimwear for warmth without restricting movement.
Meet the Athletes
Powered By Zone3
Casper
Stornes
Katrine Græsbøll
Christensen
Kieran
Lindars
Rebecca
Anderbury
Marta
Sanchez Hernandez
Matthew
Collins
Laura
Addie
Eloise
Du Luart
Jess
Fullagar
Tom
Davies
Mimi
Carlton
Sarah Jane
Goodwin
Joep
Staps
New In
High Neck Costume Swimsuit
Swimwear
The Women’s High Neck Swimsuit is part of the all-new 2026 Swimwear Collection, bringing every style into a single, unified technical swimwear range. Available in UK sizes 6–22, each suit is constructed to the same performance standard using Zone3’s innovative Xfinity Renew fabric.
Available Sizes:
6
8
10
12
14
16
18
20
22
$83.00
New In
Strap Back Swimsuit
Swimwear
The Women’s Strapback Swimsuit is part of the all-new 2026 Swimwear Collection, bringing every style into a single, unified technical swimwear range. Available in UK sizes 6–22, each suit is constructed to the same performance standard using Zone3’s innovative Xfinity Renew fabric.
Available Sizes:
6
8
10
12
14
16
18
20
22
$62.00
New In
Classic Swimsuit
Swimwear
The Women’s Strapback Swimsuit is part of the all-new 2026 Swimwear Collection, bringing every style into a single, unified technical swimwear range. Available in UK sizes 6–22, each suit is constructed to the same performance standard using Zone3’s innovative Xfinity Renew fabric. With an open back, streamlined straps, and an updated 2026 fit.
Available Sizes:
6
8
10
12
14
16
18
20
22
$83.00
New In
Jammers
Swimwear
The Men’s Jammers are made from Zone3’s premium Xfinity Renew — a performance recycled fabric developed in Italy for durability and long-term use. Offering 100% chlorine resistance, they’re built to handle daily swimming.
Available Sizes:
30
32
34
36
38
$62.00
New In
Activate+ Short Sleeve Trisuit
Trisuit
The Activate+ Short Sleeve Trisuit continues to set the standard for performance, comfort, and value, now refined with enhanced materials and athlete-driven updates.
Available Sizes:
XS
S
M
L
XL
$205.00
New In
Activate+ Short Sleeve Trisuit
Trisuit
The Activate+ Short Sleeve Trisuit continues to set the standard for performance, comfort, and value, now refined with enhanced materials and athlete-driven updates.
Available Sizes:
S
M
L
XL
XXL
$205.00
New In
Lightweight Race Visor
Headwear
Designed for runs, training, and everyday wear, the Lightweight Race Visor delivers cooling comfort and sun protection in a sleek, performance-focused fit.
$28.00
New In
Aeroforce-X II Calf Sleeves
Tri Separates
The Aeroforce-X II Aero Calf Sleeves are engineered to deliver meaningful aerodynamic efficiency gains on the bike, targeting the lower leg, a known source of aerodynamic drag. Manufactured by NOPINZ, specialists in aerodynamic performance apparel, they are designed for race-day use where marginal gains matter most.
Available Sizes:
S
M
L
XL
$81.00
New In
Activate+ Sleeveless Trisuit
Trisuit
Engineered for warm-weather racing, the Activate+ Sleeveless Trisuit delivers sustainable performance, comfort, and complete freedom of movement. Designed to keep you cool and aerodynamic, it combines advanced recycled materials with precision construction for effortless transitions from swim to run.
Available Sizes:
XS
S
M
L
XL
$191.00
New In
Activate+ Sleeveless Trisuit
Trisuit
Engineered for warm-weather racing, the Activate+ Sleeveless Trisuit delivers sustainable performance, comfort, and complete freedom of movement. Designed to keep you cool and aerodynamic, it combines advanced recycled materials with precision construction for effortless transitions from swim to run.
Available Sizes:
S
M
L
XL
XXL
$191.00