Upper: Adjustable synthetic upper, with a molded memory foam liner Footbed: Signature swellsole footbed, with lighter and softer nitrogen cooled eva and enhanced arch support through anatomic contouring Outsole: Non-marking rubber outsole with iconic Reef bottle opener Warranty: Reef wants to make sure you’re satisfied with your purchase. All Reef products are covered by a manufacturer defect policy for up to one year from the date of purchase Reef: Since 1984, Reef has been making high quality, ultra-comfortable footwear. Making sandals and shoes that take you from the beach to the streets and everywhere in-between