Fathom this!

Hard-core sunglasses for hard-core saltwater junkies. These are Costa Del Mar sunglasses from the Expedition Collection, Fathom model, with blue mirror lenses.

These co-injected cold-molded frames combine perfect fit with the best polarized lenses on the planet to give you maximum comfort and vision on the water. A true sportsman is always prepared, so keep an extra pair in your tackle box.

Every frame in the Expedition Collection features co-molded Hydrolite^TM materials for specialized temples. Here's how it works: co-molded materials are injected together into a mold and fused into one material, creating a frame with specialized temples that perform in the harshest conditions on the planet. In other words, the more someone sweats, the better the sunglasses grip the skin.