One star off for false advertising because it is NOT 8”. I bought two of these several months apart and they were both around 5 inches. I did receive a full refund for the first one with the intention of replacing it but it feels comfortable to sit on and my guest said it was very comfortable to sleep on. I ended up buying a second one to go on the trundle for the daybed. It has held up nicely but it is rarely used so that’s expected.