Black artificial leather Arizona patent sandals from BIRKENSTOCK featuring double-strap design, buckle fastening, branded insole, moulded footbed, flat rubber sole and patent coating. POSITIVELY CONSCIOUS: At least 50% of the main material of this product meets our conscious criteria. For example, it's either organic, recycled, upcycled or independently recognised as being better for the environment (such as linen, ramie, TENCEL™ etc.)..