Lands End duvet cover King Supima Cotton white blue embroidered

Lands End duvet cover King Supima Cotton white blue embroidered Lands End Supima Cotton duvet cover, king. I think it may be the 400 thread count sateen but not positive. Has embroidery across one end and 2 sides, one end is plain white. Great condition, I don't think it has even been used. My items come from a smoke free and dog friendly home.