Last updated: 3 August 2026
Reviewed by Jordan Morley, FA Level 2 Football Coach
A well-fitting wetsuit improves swim performance by adding buoyancy and reducing drag, while providing warmth in cold open water. The right suit depends on your budget, flexibility needs and whether you race or train. Here are the standout options.
Our picks
Zone3 Aspire Triathlon Wetsuit
Excellent buoyancy and flexibility at a mid-range price. A reliable all-rounder that suits most triathletes well.
Check price on AmazonOrca Athlex Float Wetsuit
Strong float panel for buoyancy, great flexibility and available at a competitive price. Popular at all levels.
Check price on AmazonZone3 Vanquish Wetsuit
Premium buoyancy panels, minimal drag and maximum shoulder flexibility. The choice for time-focused racing.
Check price on AmazonSailfish Superhero Wetsuit
Elite-level buoyancy and stretch with a fast-release design for quick T1 transitions. Trusted by Ironman competitors.
Check price on AmazonAs an Amazon Associate we earn from qualifying purchases. Prices and availability accurate at time of writing.
What to look for
Fit is the single most important factor — a poor-fitting wetsuit causes water entry, restriction and chafing. Try wetsuits on before buying if possible: the wetsuit should feel snug everywhere without restricting shoulder rotation. More buoyancy generally means faster swimming, but can feel restrictive for swimmers with a strong kick. Flexibility in the shoulders matters most. Thickness varies: thicker neoprene (5mm body, 3mm arms) is warmer and more buoyant; thinner arms improve flexibility. Check race rules — IRONMAN has temperature cut-offs above which wetsuits are illegal.
- Fit: The most critical factor. The suit should feel snug without restricting shoulder rotation. Water seeping in drastically reduces warmth and performance.
- Buoyancy vs flexibility: More buoyancy lifts your legs and reduces drag, but too much can restrict movement. Test with your specific swimming position.
- Thickness: 5/3mm (body/arms) is a common balance. Thicker = warmer and more buoyant; thinner arms = better shoulder flexibility.
Handy converters
FAQ
How much faster does a wetsuit make you?
Research suggests 3-7% faster over open water distances, primarily from improved buoyancy and body position. That translates to roughly 1-2 minutes on a 1500m swim at recreational speeds.
When are wetsuits not allowed?
Most triathlon governing bodies prohibit wetsuits above certain water temperatures (typically 24.5°C for IRONMAN, 22°C for ITU). Always check the race rules — ignoring them can result in disqualification.