Sole material Rubber Outer material Rubber Closure type Open Heel Country of Origin China About this item GAME DAY SANDALS: A game day take on Reef's best selling flip flops for men with a bottle opener in the sole of the sandal. BOTTLE OPENER: Use the church key bottle opener integrated into the rubber outsole giving you thirst quenching technology (TQT) on the go. REEF is the only men's sandal with a bottle opener. ARCH SUPPORT: Anatomical arch support flip flops for men give you a refreshing feel of satisfaction every time you slip your feet into your Fannings. FOOTBED and AIRBAG: Shock absorbing men's sandals with contoured compression molded EVA foam footbed and 360 degree heel airbag enclosed in soft polyurethane. Padded jersey liner. BEACH FREELY: REEF encourages people around the world to embrace the spirit of the beach while living by one simple rule: Beach Freely. Our products are designed to make you feel comfortable in any environment, whether you're at the beach or not.