Birkenstock Professional SUPER-BIRKI Unisex Occupational Clogs in White. These clogs feature a Polyurethane upper and sole, with a Synthetic lining. They are designed for slip-on wear and are waterproof with a round toe shape and a regular shoe width. The item weight is 0.5 KG with a flat heel height (Under 2.5cm) and a low top shaft height. These shoes are classified as Occupational/Non-Safety Shoes and are a sandal style. Safety features include a slip-resistant sole and an energy-absorbing heel, meeting the EN ISO 20347:2012 safety standard. These clogs are not gift boxed.