*There is one more covering we now use; I'll try to have a photo of it here soon.
This is the lightest covering we have. Basically we made a square that was 44" and then cut it in half to have 2 triangle coverings. We serged the edges instead of hemming. It is worn the same as the polyester covering just above, however it does not slip around since it is made of 100% cotton. It is much cooler in the summer.
Another idea too is to look up "tshirt head wrap" on youtube ... I like to use a tshirt wrap when I'm working in the garden or cleaning the house.