The Boston has always been a year-round classic. The Boston PRO with its stability and comfort. Slip-on clog 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.