The mattress is heavy and plush! once you get in it and lay down you will fall asleep fast. It's very comfortable, it's a bed that you really have to crawl into. You will get restful sleep every night or during the day. I put my niece in it for a nap and she slept soundly for three hours straight, she's 5 yrs old. My sister states that she only sleeps maybe for one hour at home. After 3 hours, my sister couldn't believe that her daughter was still sleep, she had to go wake her up so that she wouldn't be awake all night. I told my sister that she need to purchase this bed!! I love it! Thank you Wayfair!!