Review on Premium Waterproof Pillow Protectors - Extra Soft & Non-Noisy 4 Pack, Standard Size (20x26 Inches), Smooth Zipper Encasement Covers - Quiet Cases Set, 100% Liquid Protection, White, 100Gsm Super Soft by Gina Williams

I have a severe dust mite allergy and after reading the reviews I decided to try these products. I ended up buying a second pack to cover the rest of the pillows in my house. It was a HUGE help. The ones I have are not very loud. I use another pillowcase on top and use them as the main protection for the bottom layer. The only thing to note is that you may need to open the pillows to fluff the pillows regularly as pushing the air out can sometimes leave the pillow a bit flat. But it also means they're doing their job of protecting you from allergens, I think, so I think that's an acceptable trade-off.