- Side-seam reinforcement panels featuring our trademark "ST" embroidery

- Ruffled Back-strap

- Slight stretch

E-Z Pull Zipper

Cat Cay Blackout Sunglasses with Green Mirror 580P Lenses by Costa Del Mar HCTBSS-38-44R - Side-seam reinforcement panels featuringGreen Mirror 580P Lenses. Comfortable medium fit. Optical spring hinge. Heavy duty TR 90 nylon frame. Includes hard case. 100% UV light blockage for max protection. 100% polarization kills reflected glare and reduces eye strain. Built by hand and backed for life. Every pair of Costas include a lifetime warranty. Plastic lenses are lightweight, impact and scratch resistant.