Fit & Comfort

The Manta is crafted of durable lightweight TR90 nylon. The slightly smaller wrap shape delivers long-wearing comfort for medium to small face shapes. Even with a full-frame design, this sunglass is flexible—it was one of the more comfortable styles in this test. While testing the Manta in high-impact activities, like trail running and mountain biking, the gripping nosepads and temple tips helped it stay securely in place. The only downside: I’d love to see some adjustability built into this frame—moveable nosepads and/or temple tips. 

Lens Clarity

In testing, the Manta’s Green Mirror 580P lens (a plastic polarized lens), offered excellent optics and glare reduction. The 580P provided noticeable definition of objects on the trail and road. It also enhanced color contrast via Costa’s patented technology that blocks blue and yellow light for better clarity and color.

Wind Resistance

Even with the slightly smaller profile, the Manta blocked wind effectively, even in wintry and blustery conditions. Although the frame offers no venting system, I did not experience any fogging during activities.