Military-green eco leather Eva eco leather sandals from BIRKENSTOCK featuring open toe, double buckle fastening, slip-on style, branded insole, moulded footbed and flat rubber sole. 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.)..