Really is 100 o/o cotton. Very breathable. I washed it in cold water & 2 cups of white vinegar & 1/2 cup salt immediatly. No shrinkage & color fast. 
The only disappointment was it looked like a true quilt in the photo. It is a large piece of cloth with vertical stitching about every inch. Plenty of stitching to hold it together well & give it a quilted appearance. For the sale price a nice, colorful piece.