Like the sea fans that inhabit coral reefs, the Costa Del Mar Sea Fan Sunglasses are bright, bold, and appealing. The durable nylon frame helps protect your sunglasses from bumps and drops, while the Wood Fade styling makes you stand out from the crowd. Stainless steel spring hinges help keep the sunglasses securely on your head and provide easy on/off access. The Sea Fan features Costa 580P lenses, which are made of lightweight plastic and provide excellent impact and scratch-resistance. Gray lens tint maintains color saturation and natural contrast, making it an all-around choice for sports on water and land. Each pair of Costas features 100% polarized lenses, providing complete UVA, UVB, and UVC protection, as well as a lifetime warranty against defects in materials and workmanship.