Reef Fanning Mens Sandals | Bottle Opener Flip Flops for Men 。The Reef Fanning Bottle Opener Fanning Sandals in black are a stylish and functional choice for men. With a US shoe size of 12 and a UK shoe size of 11, these flip flop-style sandals feature a synthetic upper material and comfortable straps. The unique bottle opener feature adds a practical touch, making these sandals not only fashionable but also convenient for opening your favorite drinks. Perfect for a day at the beach or a casual outing, these Reef sandals are a must-have for any man\'s shoe collection.