Machine wash with similar colored laundry in warm or cold water. Never use hot water or chlorine bleach. Tumble dry on a low heat setting, making sure to dry the sack completely.
Note: Before putting the Sleepea in the washer, always attach the Velcro wings to each other and zip the sack completely closed. That will avoid damage that might be caused by Velcro clinging to other items in the load.