Good for allergies; not water resistant/absorbent and small zipper

Overall, I really like these cases. They are super soft and very comfortable. I have noticed a major difference in how I feel from my allergies when I wake up in the morning, which is a huge plus.
Unfortunately, they are not water absorbent or resistant, as the ad claims. We have had minor spills on them and it goes right through to the pillow. My other issue is that the zipper is considerably smaller than the width of the pillow, making it rather difficult to get the pillow in without damaging it (we use the foam cooling pillows).