These are the ones I bought for my sofa cushions and which my allergist at Mission Allergy recommended for my bed cushions. They are soft on the outside but similar to Tyvek on the inside. It's a little wrinkled; and very airtight. Therefore, when you lie on it, your pillow is vacuum-packed, so to speak, and inflates very slowly. They were cheap, so for my TV; not bad. But I don't want them on the pillows of my bed.
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