Well made and firm enough to firm up my bed but still keep it cushion firm! 4 inches was way too high to get sheets and mattress pads on easily but I ended up keeping it as I took it out of the box and was not able to put it back in the box after it fluffed up for a return. It came in a box marked “short” queen which I did not understand until I could not get this pad to fit my bed properly. WTH Is a short queen Of course it’s too short for my queen bed. So frustrating!! Never heard of a short queen.... was not aware I needed to be on alert when ordering for my queen bed and very disappointed by that. Would not order this product again as the green foam was pulling apart  from the other foam section. I think they were glued together. I pulled apart and used on two beds and neither piece fits either bed correctly. I just made them work. Not impressed by anything related to this purchase. Would not buy this again.