The Costa Aransas is part of the new Del Mar collection. They feature a Classic square lens shape and is considered an L fit. These sunglasses are fashioned from premium acetate. This material is the best for holding vibrant colors that remains true throughout the life of these sunglasses. All Aransas sunglasses also come with Costa’s signature 580G technology, polarized lenses that also enhance color and contrast for an unmatched visual experience on and off the water. See better with Costa.