The Boston has always been a year-round classic. The Boston SL Narrow with its superior slip resistance brings this classic to the workplace environment. Slip-on clog with adjustable buckle made for professional wear. Making the best use of natural materials but combining with an EVA midsole for enhanced comfort when standing for prolonged periods.Leather uppers. Original cork/latex footbed. EVA midsole. Natural rubber sole. Slip resistant. Smooth coated leather is very durable and soft on the skin, with a protective wipe-clean PU coating applied. Narrow fitting.