Prioritize UV protection (UV400), a secure wrap fit that follows your face, and comfortable materials. Consider polarization if you need glare reduction.

Lens type and protection (polarized vs non-polarized; UV protection), frame material and weight, and how well the frame fits around the eyes and ears to prevent slipping.

For sports or driving, look for anti-slip nose pads and temple grip; for everyday wear, lighter frames and neutral tints offer versatility.

Ask whether you need polarization to cut glare, whether you’ll wear them during activities like cycling, and whether you prefer a bold red frame or a subtler shade to match outfits.