Costa Del Mar expands its line of performance sunglasses with two siblings of the popular Fathom frame style: Stringer and Brine. All three utilize integral hinges, Hydrolite temples and co-injected, cold-molding technology to deliver a you'll-forget-they're-there fit. Stringer comes in shiny black, shiny tortoise and jade frames, and Brine is available in black, tortoise and gunmetal. Both can be fitted with any of the six WAVE 400 colors, CR39, or glass and WAVE 580. Depending on lens choice, a pair of either style ranges from $129 to $269. Call 800-447-3700 or visit www.costadelmar.com.