Mattress arrived Friday morning and we brought it inside and unwrapped within 2 hours of arrival. It is now the following Thursday and the mattress is still not inflated. (It is supposed to inflate in 24-72 hours). The corners are practically flat and the WIDEST part of the middle is only about 4.75 inches, most of it is 4 inches or less. (The twin is supposed to be 6in). Looking at the back, it doesn't even look like the white part of the cover is the right size? It seems like the white should be as big as the mattress to allow for expansion at the corners. I can't get the zipper out of the cover on the back so I cannot open it up to see if it will expand further without the cover on. The zipper on top is just for the top layer. Will be trying to schedule a return, very disappointed.

Everyone is happy with this mattress! It is definitely waterproof, and comes with an extra topper waterproof cover so while one is being washed, you have a backup to put on and get your child back to sleep quickly. Medium firmness had me worried because I know firm is preferred for developing bodies, but we decided to give it a try thanks to the Sam's return policy. This twin 6" foam mattress is firm enough for a toddler. Would not recommend for adults as a nightly sleeper as the twin is intended to be a bunk bed mattress at only 6" thickness and meant for children who are going through the potty training phase of life. After rolling mattress out, allow 48 hours to breathe and fluff up before judging firmness. We plan to replace when our now 3 year old toddler turns about 10. Thank you Zinus and Sam's for offering such a quality mattress geared towards this very specific window in our toddlers life at an affordable price!

It unrolled from the box very easily. It came with a second cover which is nice to have an extra one. It expanded well over a few days. The bed is pretty comfortable and one of my kids said it was the best night sleep they have gotten in a while.

It arrived in good shape and early. It decompressed in the stated time and it is quite comfortable as well. Happy with my purchase.

Nice firm mistress for little ones! I love that the washable cover zips off and is so easy to change and it comes with TWO covers!

Perfect for those that prefer a firm mattress. Plush yet firm

Comfy

it is good