I am so happy I finally found a RV King that fit. Our bed is 72x80 and these are great. Get a little baggy once slept on for a few days but, corner does not pop off. I bought another set.The cotton fabric is medium weight, has a slight brushed finish and when taken out of the dryer promptly there is minimal wrinkles. Corner seams have elastic as well as all around the bottom edge of the fitted sheet. We have an 8-inch high mattress and these sheets stay put. I would not hesitate to put them on a 10-inch high mattress, not sure about a 12-inch mattress.I got the 3/4 sheets to fit the topper I bought . They felt smoother before washing , out of the dryer not smooth not all scratchy .Sheets do wrinkle. Soft and comfortable.These are the perfect sheets for our odd size RV bed! They fit perfectly, have great elastic in the corners so the sheets stay on and they are so soft! I will order more for our bed at home!The sheets fit our bed in our boat that is 70”x80”. It’s a bit big, but folds over and tucks nicely. It stays on the mattress during sleep. The blue is a pretty color and the material is nice to sleep onquality ok sheets thread count okThis sheet is for a camper king mattress. It is still way too big and the color is awful, the color of baby Pooh.