From L.L.Bean, the Men's Daybreak Mallard Duck Motif Slippers feature: Wool-clog-style upper made from 90% wool, 10% polyester Convenient open-backed mule styles allow for easy on/off High-pile polyester fleece sock liner for warmth and comfort Polyester fleece covered EVA footbed with slight arch contour for all-day comfort (not removable) Half sizes order up Durable polyurethane midsole Anti-slip rubber sole for dependable traction Spot clean Imported.