Neka offers you a standard size pillow filled with buckwheat hulls. Features: - Adjustable. We can adjust the amount of buckwheat hulls to adapt the pillow to our needs. - Washable. The cover is machine washable. - Hypoallergenic. Recycled natural fiber with long life. - Anti-dust mite. - Marries the cervical spine. - Optimal head and neck support. - Reduces muscle stiffness and tension. - Soothes pain related to back problems. Envelope: 68% polyester and 32% cotton fabric with a clasp that contains the buckwheat hulls. It is therefore possible to adjust the quantity of hulls desired or to empty the envelope of its contents to clean it. Filling: 100% buckwheat hulls** Size: Standard size 24 in x 16.5 in x 5 in (60 cm x 42 cm x 13 cm) Weight: Approximately 2.7 kg (6 lbs) Maintenance: All our covers have a clasp so it is possible to wash them. Hulls should be removed before washing. *Never put the shells in water. (see FAQs) **The hulls are obtained during the hulling of the buckwheat seed. These are hypoallergenic natural fibers. In addition, they have the property of not retaining body heat. So, in contact with the cushion, you don't sweat.