The Rio Vanda combines a bio-based brown frame with Vision polarized lenses designed for fishing. The slightly curved profile provides good coverage without looking too sporty, making this model easy to wear out of the water. Polarflite lenses filter surface glare while providing natural vision, while Flashflite Amber enhances contrast in low light. Photoflite and PhotoCarbon lenses darken in UV light, with the PhotoCarbon version made of lighter, impact-resistant polycarbonate. When choosing, the key factor is the lighting conditions you’ll encounter: a darker tint for sunny weather, and a lighter tint for overcast skies or at the end of the day.