Costa Sunglasses has launched four new unisex metal styles with lightweight titanium frames and castor-seed Bio-Resin and Hydrolite temple tips. Turret features a medium frame with a full rim and comes in three colors: matte black, matte dark gunmetal and matte silver. Helo offers a large fit with a back chassis, providing a rimless look. The Skimmer and Pilothouse are extra-large. All include adjustable temple tips, full-motion nose pads, textured rubber temple pads, and internal spring hinges; all are available with Costa's 580 polycarbonate lenses in various color options. The sunglasses cost $219 to $239.