I use sheets all the time-I pick them up at garage sales-I have never had a problem with them-they are cheaper than fabric store material. Some times I'll use the sheet as pieces for the top of the quilt if it suits my color combo. Of course I always wash the sheet before using it, weather it is new or from a garage sale you never know where it has been even if they tell you it has been washed before they put it on the sale.