Look closely at the hinges of the sunglasses. Only stainless-steel hinges are used in all Costa Del Mar eyewear. Counterfeits will often have poorly aligned hinges. Check the lenses of the sunglasses.
That being said, there’s a cost to clarity. Luckily for you, there is a seriously epic sale on Costa sunglasses for Black Friday. If you’ve been pinching pennies, now’s the time to grab a pair.
However, this year may be different. My newest pair of sunglasses is the Waterwoman from Costa Del Mar, and they're everything I need: extremely durable, scratchproof, lightweight, and (I think ...