Stretch Knit Polyester Dust Mite & Allergy Control Pillow Protector

I bought these for use on my pillows for bedbug protection. The material is the same finely knit weave like my bedbug mattress protector. However it is not totally bedbug proof because the end of the zipper leaves a gap, so it's never fully sealed. So I put a small amount of duct tape over the zipper and corner, and it's closed. This works for me, and is sooo much less expensive than buying "bedbug-proof" pillow covers.