A 630 from Birkenstock Black Polyurethane

The A630 clog by Birkenstock lets you work hard confident your feet are protected and comfortable all day.It is a heavy-duty, polyurethane clog for professional workplaces where you need extra protection.
~ Polyurethane surface is tough and durable, stain resistant and easily cleanable
~ Removable cork footbed is contoured to support your arches to ensure even weight distribution and proper posture
~ A deep heel cup cradles the heel and keeps natural cushioning under the heel bone
~ Tough, slip-resistant soles prevent slipping on wet or oily surfaces and are certified ASTM F 1677-96 rated