Costa Del Mar Blackfin Polarized BL 11 OAP polarized Asian-fit sunglasses with matte, black nylon frames will shield your eyes from harmful UV rays and enable you to cut surface glare to make out submerged features and spot bedding fish. Amber lenses sharpen vision in low-light conditions. Curved frames fit under hat brims, and temple pieces reduce side-light that reduces acuity of vision. They come with a $20-value lens kit that includes a lens cleaning solution and microfiber cloth. and a certificate of authenticity.