I bought the queen 2-pack set back in December at BBB ($27.99 + 20% coupon), and had it in my cart in case I was able to file a Discover price protection claim on them. These price drops are outside of that window for me, but I wanted to report on this solid price drop:
Thesweethome touts Protect-A-Bed's AllerZip pillow protectors as the best you can buy in terms of quality and accessible price point. You can read their review here [thesweethome.com]
I rarely sweat while sleeping, but I have been put off by how easily sweat has penetrated past pillow protectors I've used. This naturally leads to unsightly yellow staining and mild odors, and forces me to wash pillows more often than I like.
That said, this is my fifth set of pillow protectors over the last 8 years, and it has been the set I have been most satisfied with. I bought a new set of pillows in conjunction with these protectors back in December, and it has endured two cold sweat nights with no issues so far. I regularly wash my pillow protectors about once every 2 weeks, but have not had to wash my pillows once.