This is an air-filled nursing pillow. You can adjust the amount of air, so it won't sag. It's easy to take with you when traveling and easy to wash. A spare cover is also included. The pink cover has some pilling. Purchased from the following site. Please check here for product details. https://item.rakuten.co.jp/amethyst/0317/?s-id=ph_sp_itemimage https://item.rakuten.co.jp/amethyst/0253/?s-id=ph_sp_itemimage