The Reef Adjustable BYOB comes with a water friendly, synthetic nubuck upper and the same awesome footbed and outsole as the now legendary Fanning. The footbed is made from compression molded EVA with anatomical arch support and a huge 360 heel airbag. The great thing about the BYOB is the velcro adjustable upper and its appeal to those who don't like the 'toe-post' on a more traditional flip-flop. Bring Your Own Bottle.