Birkenstock Bilbao men's dark brown classic two-strap slip-on sandalIs foot comfort a priority? Are you on your feet all day long? Do you often have foot or back problems? Birkenstock developed the Bilbao model to meet these needs. Nurses in particular appreciate these slippers with a soft foot bed and air cushions Two adjustable straps ensure that you stand firmly in your shoes Upper material is made from a patented Birkenstock material with a soft layer underneath Sole has a deep non slip tread and is oil and grease