A:Answer Hello, thank you for contacting us! Our POWERCAP Hats & Beanies can be washed, but they need to be hand washed and not machine washed. Washing instructions for them are to before washing, first remove the batteries. Hand wash warm, separately without bleach. Line dry for at least 24 hours, then replace the batteries when dry. Do not iron & do not dry clean. Thanks again for your question, please reach out to us if you need additional information.