I ordered two of these earlier in the year when I was diagnosed with dust mite allergies. These covers are great! They wash well too and don't have a weird plastic feel, like others I had read about. I was concerned that the material may be too hot for me... I have had nights where I wake up with a sweaty head in the middle of the night and certainly didn't want a product that would encourage more of that! I've had them for months now and have not had any problems. I just ordered another set!