I purchased a buckwheat hull pillow online, but the height was too high for my neck, so I removed some of the buckwheat hulls to adjust it. I only used the pillow once and had a cover on it, but please refrain from purchasing if you are concerned. Please consider this for refills or replacements. Due to the thickness, I will ship via Yu-Packet Post. I can ship up to two pillows via Yu-Packet. For two pillows, it will be an additional 120 yen. Buckwheat Hulls Sobagara