Look for UV protection and glare-reducing lenses (polarized if possible), a secure wrap-style frame or rubberized temples for a stay-in-place fit, and durable coatings that resist water and fog.

Key criteria include lens type and color, polarization, UV rating, frame fit and material, weight, and grip. Also consider coatings for scratch resistance and comfort during long sessions.

Polarized lenses cut glare off the water and improve visibility, but they can make it harder to read certain screens or glassy surfaces. If you navigate by eye and need true glare reduction, polarization is usually worth it.

Paddling: secure grip and a snug wrap to stay put during movement. Sailing: strong glare control and a robust, comfortable fit. Fishing: high-contrast lens tint and all-day comfort for long wear.