I am very picky about the mattresses I purchase for my kids. 3 newborns within 17 years and 3 new mattresses. I like them safe, chemical/toxin free and firm. This one delivers. It's light and flexible enough that it's simple to change my daughters crib sheets with or without taking it out of the crib. I like that it's organic. It's a little pricey, but we have a tummy sleeper so safety is key for us.