These unbleached cotton wheat bag pillows of lavender heaven are made with organic handpicked British Lavender, organic lavender essential oil and organic wheat grain and are removable from their outer cotton pouch Suitable for use both warm and cold they can be warmed in the microwave or chilled in the freezer depending on your need To clean empty the lavender and wheat grain into a bowl, machine wash both the pillow and outer pouch on a warm cycle. Ensuring both are completely dry before reassembling