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These Costa Del Mar Ballast Polarized BA 10 OAP polarized sunglasses have Tortoise Nylon frames. Costa Del Mar sunglasses shield eyes from damaging UV (ultraviolet) radiation and reduce disabling or blinding surface glare, making them particularly useful for boating, driving, and other outdoor activities. ightweight, curved frames allow ventilation, resist slipping, and are curved to fit under hat brims. They come with a $20-value lens kit that includes a lens cleaning solution and microfiber cloth. and a certificate of authenticity.
Amber lenses enhance vision by blocking the somewhat hazy, blue end of the color spectrum, which results in greater contrast and improved depth perception. Wearers report crisper vision and increased ability to discern shapes, too, especially against green and blue backgrounds. They aid in discerning fish and underwater structures while sight-fishing in relatively shallow water. This is a good choice if you're going to be out in low-light conditions or on a day with changing weather patterns.