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When it comes to the fashion world and recycling trends, sayings like "what's old is new again" are words to live by. Whether it's the reemergence of the beloved '90s overall or '70s-inspired, wide-leg trousers making a comeback, recycling trends is something we've all grown quite accustomed to seeing. With one, last beach weekend approaching this Labor Day, we thought we'd focus in on one, vintage accessory in particular: timeless sunglasses. From aviators to cat eyes, click through to see how some of our go-to frames came to be, who inspired the trends, and where to score our favorite, must-have pairs for yourself.