It's true now, and it was true then: We'll do anything to stay on the water longer. In 1983, a group of anglers created Costa Sunglasses to stand up to the harsh light, unforgiving salt and rough conditions of a day at sea. Costa Del Mar sunglasses sold by authorized sellers, like Amazon, are eligible for all manufacturer warranties and guarantees. Click on the Costa Del Mar link above the product title to shop the entire Costa Del Mar sunglass and eyeglass assortment.