Bucky  Hottie Neck Wrap,Beach Grass,20- x 12- Inch Can Be Heated Or Chilled Warm In Microwave Chill In Freezer Buckwheat Seeds Release Heat Or Cold Slowly Removable Machine Washable Cover Cover: 54% rayon 29% polyester, 17% cotton liner: 100% cotton filling: 100% buckwheat seeds Machine washable cover