Giesswein Women's Hartburg Mule 100% Natural Boiled Wool Imported Rubber sole 100 percent natural boiled wool with handstitched skier applique 100 percent boiled wool is naturally water resistant and temperature regulating in all seasons Orthotic quality removable anatomically correct proprietary footbed with longitudinal and metatarsal arch support Slip resistant non marking natural latex outsole Boiled wool temperature regulate wick away moisture for a dry healthy environment for feet year round and naturally anti microbial wool is never itchy or scratchy and our edge free midseam ensures form fitting comfort with no rubbing or chafing