Happy Lamb undergoes a natural felting process within the first 6-8 months of consistent use, during which time the fleece takes on a slightly matted appearance. Spot clean and sun during this time to refresh. After the initial break-in period, Happy Lamb Fleece can be machine washed in cold water. Manually set to soak and spin cycles only. Do not use the wash cycle, which agitates and can ruin your Happy Lamb. For stained items, add a dose of live cultured enzymes (try Bac-Out by Biokleen) during soak. Drape in the sun or warm place to dry. Do not wring or machine dry.