For a Good Night's Sleep! Filled with an exclusive synthetic down called Fusionâ„¢ fiberfill, our Pure Slumber Pillows are hypoallergenic and ensure you or your little one a good night's sleep. To keep your pillow hygienically clean and free of dust-mite allergens, simply place it in your washer and dryer when needed. This pillow won't clump up like others might, and you can easily freshen it up to achieve a new-like feel by simply fluffing it or shaking it.