The sheets arrived promptly, and the dinosaur designs were just as vibrant and cute as they had looked on my computer's screen. The fabric is a nice crisp cotton percale. I'm familiar enough with this type of fabric to know that it gets softer with age and use, and is very comfortable to sleep in. The only reason I gave them 4 stars instead of 5 is the fact that they do come out of the dryer slightly wrinkled.