Photo showing a girl's legs, pictured as she walks barefoot along the beach, with a pair of blue flip flops left on seaside sand, in the foreground. These beach sandals / thongs are pictured in the sunshine, with the gentle waves of the blue sea lapping on the beachfront in the background of the picture. Flip flops are an open-toed rubber sandal with a Y-shaped thong strap than separates the big toe. This type of beach footwear is also often known as chanklas, go-aheads, jandals, slaps and step-ins, as well as pluggers and slides.