Do you use pillow 'undercovers'?

[NormaSnorks]

i.e. a thin pillowcase under your main pillowcase...

I do, because my Mum did, but sometimes I just wonder if it isn't a bit excessive

It does seem to stop the pillows getting dirty covers though?

Yes and I wash the pillows too, every couple of months for dh's cause he has The most sweaty head yurk!