Bests & Worsts Reviews from Amazon

This is the third one of these Keyocean Nightgowns that I have ordered. All three are described as 100% cotton. The first two, one white and one light blue, were in fact 100% cotton. They are very soft and very good for the price, and I like that they are long, so I decided to get a third. This third one, the blue floral print, also says 100% cotton right in the description, but the one I received (which looks just like the picture) to my dismay is made of 95% viscose and 5% elastane. Washing instructions say hand wash and do not tumble dry. So I sent this one back. I don't understand why they would advertise one thing and then substitute with something totally different! I am going to order another white one and hope for the best.