Mattress for Kids8" hybrid mattress with 6" innerspring and custom foam layers to provide the right safety, comfort, support, and durability for growing kids with changing needs and preferences. The firmer side is great for younger kids (suggested for 3 7 year olds) when they need additional support to aid the proper development of their growing bodies. As kids get older, they tend to favor mattresses with more of a comforting feel, which is why we created a softer