Synthetic upper with a no sew hot melted overlay Perforated and padded liner for breathability and comfort High rebound molded EVA footbed for support and comfort 360 degree airbag under the heel Bottle opener on the outsole Molded rubber outsole for durability and traction Water friendly - Be ready for any water adventure. From the beach to the lake or just hanging out by the pool, this style can handle the splashes. Bottle opener - Features a bottle opener built into the footbed to open your 'soda' after a surf session or hanging at the pool. Introducing the Fanning Low with Thirst Quenching Technology! Fully equipped with a perforated and padded liner for breathability and comfort, a high rebound molded EVA footbed, 360 degree airbag under the heel, and of course, a bottle opener on the outsole for cracking a couple of cold ones!