The Best Flip Flips to Wear this Summer - The Viral Brands You Need to Know. Flip-flops are this summer’s must-have ‘It’ shoe, effortless, versatile, and everywhere. From The Row to Havaianas and Tkees, here’s my curated edit of the most popular flip-flop brands to buy now. LTKStyleTip LTKOver40 LTKShoeCrush