These are by far the best pillows that we have ever found. We bought them at Bed, Bath, and Beyond about 20 years ago and have bought several sets since, most recently from Macy’s. They last forever. We still have the ones we bought 20 years ago. They are a little pricey but oh soooooo comfy! They are on sale right now. That is the only way we buy them. They have a zipper cover that can be washed separately and you can also wash the pillows themselves. We have washed and dried the older ones several times.
https://www.macys.com/shop/product/indulgence-by-isotonic-side-sleeper-pillow-collection?ID=15805955