If you don t like a foam mattress that is too soft then the Sweetnight hybrid mattress is a good choice for you. Sweetnight hybrid mattress provides good support and a suitable medium firmness due to the individually wrapped innerspring coils. Sweetnight twin hybrid mattress is especially suitable for children because children are in a period of rapid physical growth. A hybrid mattress can provide good support for the spine which is beneficial for the growth of the spine. The individually wrapped innerspring coils have a motion isolation function which will not disturb you when your partner tossing and turning. Sweetnight hybrid mattress has a layer of gel memory foam allowing you to fall asleep coolly without waking up overheat in the middle of the night. Gel memory foam is certified by Certi-Pur-US it s safe and durable. Sweetnight mattress cover fabric is certified by Oeko-tex it is breathable and soft. This bed cover is very friendly to children pregnant women and people with sensitive skin. Sweetnight twin hybrid mattress in a box and shipped to your door for easy setup. You just need to open this mattress and wait for 72 hours to fully expand then you can use it.