How to care for your Wonder Wraps (from here):

• Fasten tabs to laundry tabs on the inside of cover.
• Wash on warm or hot with 1/3 amount detergent. We recommend Charlie's Soap or any store brand (Tide, Gain, etc)
• Tumble dry or line dry, whatever your preference is.
• Upon removing from dryer DO NOT PULL OR STRETCH THE ELASTIC. Wait for the cover to cool before pulling on elastic.