Aqua Sphere Kaiman Swim Goggles with Clear Lens (Blue). UV Protection Anti-Fog Swimming Goggles for Adults

Why it's worth it

The Kaiman has been a triathlon and open water staple for years, built around a curved lens that gives you a 180-degree view without warping what you see. The soft frame conforms to most faces, and the clear lens version works indoors as well as on grey days outside.

The curved lens gives you width without distortion. Aqua Sphere bends the Plexisol lens into an arc rather than using two flat panes, which opens up roughly 180 degrees of vision while keeping the image straight. In open water that means you can track a buoy line and the swimmers on either side of you with barely a head turn. In a pool it just makes the whole swim feel less like looking through a letterbox.

The frame is soft enough for genuinely long swims. The flexible frame material spreads pressure across your face instead of concentrating it around the orbital bone, and owners consistently describe finishing long swims without deep marks. If you're doing a two-hour open water session or a slow build toward a distance event, that comfort is what determines whether you finish thinking about your stroke or your face.

From our review of 5 swimming goggles, by Eleanor Vance, Health & Beauty Editor

What we like

• +The curved lens gives you width without distortion
• +The frame is soft enough for genuinely long swims
• +The clear lens is the versatile choice, and that's underrated
• +It carries full UVA and UVB protection with a scratch-resistant anti-fog coating

What to know

• –The frame is bulky by racing standards
• –The seal can be finicky on narrower faces