Review on 🛏️ Premium 4-Pack Pillow Protectors: Standard Size 20x26 Inches, High Thread Count 400, Cotton Sateen Blend, Tight Weave, Non Noisy, Zippered, White - Lifetime Replacement Guarantee! by Jen Linares

I have worked with fabrics all my life. It is not cotton, certainly not 100% cotton and not 400 thread count. The weave should be very tight and smooth. This loosely woven fabric certainly does not protect against bed bugs or mites. They say it has a satin finish, but it's actually pretty rough. I suspect the sellers see that 100% cotton and 400 thread count is what people want, so they just choose to say it. I suppose if you only want zippered pillowcases the price for 4 of these isn't totally unreasonable but don't expect them to be 100% cotton 400 thread count. Revain needs to remove this seller from its list.